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Schedule III - Real Estate and Accumulated Depreciation (Details) | 12 Months Ended |  |  |
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Dec. 31, 2020 USD ($) ApartmentUnit | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Accumulated Depreciation | $ (7,859,657,000) | $ (7,276,786,000) | $ (6,696,281,000) | $ (6,040,378,000)
100 K Apartments (fka 100K Street) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 222 |  |  |
Initial Cost to Company, Land | $ 15,600,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 70,296,069 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 18,484 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 15,600,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 70,314,553 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 85,914,553 |  |  |
Accumulated Depreciation | (6,076,767) |  |  |
Investment in Real Estate, Net | 79,837,786 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
140 Riverside Boulevard [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 354 |  |  |
Initial Cost to Company, Land | $ 103,539,100 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 94,082,725 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 10,817,358 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 103,539,100 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 104,900,083 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 208,439,183 |  |  |
Accumulated Depreciation | (56,324,733) |  |  |
Investment in Real Estate, Net | 152,114,450 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
160 Riverside Boulevard [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 455 |  |  |
Initial Cost to Company, Land | $ 139,933,500 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 190,964,745 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 18,135,193 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 139,933,500 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 209,099,938 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 349,033,438 |  |  |
Accumulated Depreciation | (112,149,211) |  |  |
Investment in Real Estate, Net | 236,884,227 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
170 Amsterdam [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 236 |  |  |
Initial Cost to Company, Land | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 112,096,955 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 734,040 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 112,830,995 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 112,830,995 |  |  |
Accumulated Depreciation | (25,078,672) |  |  |
Investment in Real Estate, Net | 87,752,323 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
175 Kent [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Brooklyn, NY |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 113 |  |  |
Initial Cost to Company, Land | $ 22,037,831 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 53,962,169 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,476,612 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 22,037,831 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 56,438,781 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 78,476,612 |  |  |
Accumulated Depreciation | (20,147,633) |  |  |
Investment in Real Estate, Net | 58,328,979 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
180 Montague (fka Brooklyn Heights) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Brooklyn, NY |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 193 |  |  |
Initial Cost to Company, Land | $ 32,400,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 92,675,228 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 5,346,485 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 32,400,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 98,021,713 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 130,421,713 |  |  |
Accumulated Depreciation | (30,697,551) |  |  |
Investment in Real Estate, Net | 99,724,162 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
180 Riverside Boulevard [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 516 |  |  |
Initial Cost to Company, Land | $ 144,968,250 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 138,346,681 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 16,593,445 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 144,968,250 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 154,940,126 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 299,908,376 |  |  |
Accumulated Depreciation | (83,930,689) |  |  |
Investment in Real Estate, Net | 215,977,687 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
1210 Mass [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 144 |  |  |
Initial Cost to Company, Land | $ 9,213,512 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 36,559,189 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 3,222,293 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 9,213,512 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 39,781,482 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 48,994,994 |  |  |
Accumulated Depreciation | (21,574,097) |  |  |
Investment in Real Estate, Net | 27,420,897 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
1401 Joyce on Pentagon Row [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 326 |  |  |
Initial Cost to Company, Land | $ 9,780,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 89,668,165 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 5,636,363 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 9,780,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 95,304,528 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 105,084,528 |  |  |
Accumulated Depreciation | (41,418,326) |  |  |
Investment in Real Estate, Net | 63,666,202 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
1500 Mass Ave [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 556 |  |  |
Initial Cost to Company, Land | $ 54,638,298 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 40,361,702 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 16,685,633 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 54,638,298 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 57,047,335 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 111,685,633 |  |  |
Accumulated Depreciation | (31,601,970) |  |  |
Investment in Real Estate, Net | 80,083,663 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
1800 Oak (fka Rosslyn) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 314 |  |  |
Initial Cost to Company, Land | $ 31,400,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 109,005,734 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 8,912,514 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 31,400,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 117,918,248 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 149,318,248 |  |  |
Accumulated Depreciation | (37,308,243) |  |  |
Investment in Real Estate, Net | 112,010,005 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
2201 Pershing Drive [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 188 |  |  |
Initial Cost to Company, Land | $ 11,321,198 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 49,674,175 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,798,189 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 11,321,198 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 52,472,364 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 63,793,562 |  |  |
Accumulated Depreciation | (17,223,799) |  |  |
Investment in Real Estate, Net | 46,569,763 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
2201 Wilson [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 219 |  |  |
Initial Cost to Company, Land | $ 21,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 78,724,663 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 5,288,939 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 21,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 84,013,602 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 105,913,602 |  |  |
Accumulated Depreciation | (26,463,239) |  |  |
Investment in Real Estate, Net | 79,450,363 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
2400 M St [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 359 |  |  |
Initial Cost to Company, Land | $ 30,006,593 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 114,013,785 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,779,484 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 30,006,593 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 118,793,269 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 148,799,862 |  |  |
Accumulated Depreciation | (61,688,804) |  |  |
Investment in Real Estate, Net | 87,111,058 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
315 on A [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Boston, MA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 202 |  |  |
Initial Cost to Company, Land | $ 14,450,070 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 115,824,930 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,442,998 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 14,450,070 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 117,267,928 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 131,717,998 |  |  |
Accumulated Depreciation | (27,148,732) |  |  |
Investment in Real Estate, Net | 104,569,266 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
340 Fremont (fka Rincon Hill) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | San Francisco, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 348 |  |  |
Initial Cost to Company, Land | $ 42,000,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 248,608,702 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 366,576 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 42,000,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 248,975,278 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 290,975,278 |  |  |
Accumulated Depreciation | (43,051,114) |  |  |
Investment in Real Estate, Net | 247,924,164 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
341 Nevins [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Brooklyn, NY |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 0 |  |  |
Initial Cost to Company, Land | $ 3,621,717 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 261,079 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 0 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 3,621,717 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 261,079 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 3,882,796 |  |  |
Accumulated Depreciation | 0 |  |  |
Investment in Real Estate, Net | 3,882,796 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
3003 Van Ness (fka Van Ness) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 625 |  |  |
Initial Cost to Company, Land | $ 56,300,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 141,191,580 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 8,427,901 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 56,300,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 149,619,481 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 205,919,481 |  |  |
Accumulated Depreciation | (49,200,506) |  |  |
Investment in Real Estate, Net | 156,718,975 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
425 Mass [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 559 |  |  |
Initial Cost to Company, Land | $ 28,150,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 138,600,000 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 5,317,169 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 28,150,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 143,917,169 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 172,067,169 |  |  |
Accumulated Depreciation | (58,212,092) |  |  |
Investment in Real Estate, Net | 113,855,077 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
455 Eye Street [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 174 |  |  |
Initial Cost to Company, Land | $ 11,941,407 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 61,418,689 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 59,540 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 11,941,407 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 61,478,229 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 73,419,636 |  |  |
Accumulated Depreciation | (8,480,027) |  |  |
Investment in Real Estate, Net | 64,939,609 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
4th and Hill [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 0 |  |  |
Initial Cost to Company, Land | $ 13,131,456 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 18,548,300 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 0 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 13,131,456 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 18,548,300 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 31,679,756 |  |  |
Accumulated Depreciation | 0 |  |  |
Investment in Real Estate, Net | 31,679,756 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
55 West Fifth I & II (fka Townhouse Plaza and Gardens) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | San Mateo, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 241 |  |  |
Initial Cost to Company, Land | $ 21,041,710 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 71,931,323 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 14,359,593 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 21,041,710 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 86,290,916 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 107,332,626 |  |  |
Accumulated Depreciation | (32,617,071) |  |  |
Investment in Real Estate, Net | 74,715,555 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
600 Washington [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 135 |  |  |
Initial Cost to Company, Land | $ 32,852,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 43,140,551 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,440,539 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 32,852,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 45,581,090 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 78,433,090 |  |  |
Accumulated Depreciation | (23,873,446) |  |  |
Investment in Real Estate, Net | 54,559,644 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
660 Washington (fka Boston Common) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Boston, MA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 420 |  |  |
Initial Cost to Company, Land | $ 106,100,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 166,311,679 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 7,631,972 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 106,100,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 173,943,651 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 280,043,651 |  |  |
Accumulated Depreciation | (52,935,820) |  |  |
Investment in Real Estate, Net | 227,107,831 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
70 Greene [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Jersey City, NJ |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 480 |  |  |
Initial Cost to Company, Land | $ 28,108,899 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 236,763,553 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 3,894,770 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 28,108,899 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 240,658,323 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 268,767,222 |  |  |
Accumulated Depreciation | (90,074,628) |  |  |
Investment in Real Estate, Net | 178,692,594 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
71 Broadway [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 238 |  |  |
Initial Cost to Company, Land | $ 22,611,600 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 77,492,171 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 18,570,618 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 22,611,600 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 96,062,789 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 118,674,389 |  |  |
Accumulated Depreciation | (55,283,708) |  |  |
Investment in Real Estate, Net | 63,390,681 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
77 Bluxome [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | San Francisco, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 102 |  |  |
Initial Cost to Company, Land | $ 5,249,124 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 18,609,876 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 498,937 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 5,249,124 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 19,108,813 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 24,357,937 |  |  |
Accumulated Depreciation | (7,020,181) |  |  |
Investment in Real Estate, Net | 17,337,756 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
77 Park Avenue (fka Hoboken) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Hoboken, NJ |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 301 |  |  |
Initial Cost to Company, Land | $ 27,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 168,992,440 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 8,837,952 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 27,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 177,830,392 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 205,730,392 |  |  |
Accumulated Depreciation | (54,327,929) |  |  |
Investment in Real Estate, Net | 151,402,463 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
777 Sixth [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 294 |  |  |
Initial Cost to Company, Land | $ 65,352,706 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 65,747,294 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 5,748,406 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 65,352,706 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 71,495,700 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 136,848,406 |  |  |
Accumulated Depreciation | (33,061,181) |  |  |
Investment in Real Estate, Net | 103,787,225 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
88 Hillside [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Daly City, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 95 |  |  |
Initial Cost to Company, Land | $ 7,786,800 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 31,587,325 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 3,442,015 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 7,786,800 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 35,029,340 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 42,816,140 |  |  |
Accumulated Depreciation | (12,829,331) |  |  |
Investment in Real Estate, Net | 29,986,809 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
855 Brannan [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | San Francisco, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 449 |  |  |
Initial Cost to Company, Land | $ 41,363,921 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 282,133,994 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 132,534 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 41,363,921 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 282,266,528 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 323,630,449 |  |  |
Accumulated Depreciation | (34,706,782) |  |  |
Investment in Real Estate, Net | 288,923,667 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
929 Mass (fka 929 House) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Cambridge, MA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 127 |  |  |
Initial Cost to Company, Land | $ 3,252,993 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 21,745,595 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 8,432,225 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 3,252,993 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 30,177,820 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 33,430,813 |  |  |
Accumulated Depreciation | (21,091,399) |  |  |
Investment in Real Estate, Net | 12,339,414 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Academy Village [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | North Hollywood, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 248 |  |  |
Initial Cost to Company, Land | $ 25,000,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 23,593,194 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 11,156,576 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 25,000,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 34,749,770 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 59,749,770 |  |  |
Accumulated Depreciation | (21,580,086) |  |  |
Investment in Real Estate, Net | 38,169,684 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Acappella [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Pasadena, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 143 |  |  |
Initial Cost to Company, Land | $ 5,839,548 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 29,360,452 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,419,827 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 5,839,548 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 31,780,279 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 37,619,827 |  |  |
Accumulated Depreciation | (13,423,512) |  |  |
Investment in Real Estate, Net | 24,196,315 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Acton Courtyard [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Berkeley, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 71 |  |  |
Initial Cost to Company, Land | $ 5,550,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 15,785,509 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 445,554 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 5,550,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 16,231,063 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 21,781,063 |  |  |
Accumulated Depreciation | (8,147,133) |  |  |
Investment in Real Estate, Net | 13,633,930 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Alban Towers [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 229 |  |  |
Initial Cost to Company, Land | $ 18,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 89,794,201 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 7,195,879 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 18,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 96,990,080 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 115,890,080 |  |  |
Accumulated Depreciation | (29,449,847) |  |  |
Investment in Real Estate, Net | 86,440,233 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Alborada [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Fremont, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 442 |  |  |
Initial Cost to Company, Land | $ 24,310,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 59,214,129 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 9,737,294 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 24,310,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 68,951,423 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 93,261,423 |  |  |
Accumulated Depreciation | (47,184,982) |  |  |
Investment in Real Estate, Net | 46,076,441 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Alcott Apartments (fka West End Tower) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Boston, MA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 0 |  |  |
Initial Cost to Company, Land | $ 10,424,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 257,358,529 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 0 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 10,424,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 257,358,529 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 267,782,529 |  |  |
Accumulated Depreciation | 0 |  |  |
Investment in Real Estate, Net | 267,782,529 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Altitude (fka Village at Howard Hughes, The (Lots 1 & 2)) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 545 |  |  |
Initial Cost to Company, Land | $ 43,783,485 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 150,235,105 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 612,403 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 43,783,485 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 150,847,508 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 194,630,993 |  |  |
Accumulated Depreciation | (26,754,900) |  |  |
Investment in Real Estate, Net | 167,876,093 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Alton, The (fka Millikan) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Irvine, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 344 |  |  |
Initial Cost to Company, Land | $ 11,049,027 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 96,524,128 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 243,844 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 11,049,027 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 96,767,972 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 107,816,999 |  |  |
Accumulated Depreciation | (15,320,884) |  |  |
Investment in Real Estate, Net | 92,496,115 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Arbor Terrace [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Sunnyvale, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 175 |  |  |
Initial Cost to Company, Land | $ 9,057,300 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 18,483,642 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 11,966,964 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 9,057,300 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 30,450,606 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 39,507,906 |  |  |
Accumulated Depreciation | (19,584,926) |  |  |
Investment in Real Estate, Net | 19,922,980 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Arches,The [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Sunnyvale, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 410 |  |  |
Initial Cost to Company, Land | $ 26,650,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 62,850,000 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 3,279,238 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 26,650,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 66,129,238 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 92,779,238 |  |  |
Accumulated Depreciation | (27,016,180) |  |  |
Investment in Real Estate, Net | 65,763,058 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Artisan on Second [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 118 |  |  |
Initial Cost to Company, Land | $ 8,000,400 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 36,074,600 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,298,143 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 8,000,400 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 37,372,743 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 45,373,143 |  |  |
Accumulated Depreciation | (14,173,055) |  |  |
Investment in Real Estate, Net | 31,200,088 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Artistry Emeryville (fka Emeryville) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Emeryville, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 267 |  |  |
Initial Cost to Company, Land | $ 12,300,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 61,466,267 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 7,368,364 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 12,300,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 68,834,631 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 81,134,631 |  |  |
Accumulated Depreciation | (23,980,609) |  |  |
Investment in Real Estate, Net | 57,154,022 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Atelier [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Brooklyn, NY |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 120 |  |  |
Initial Cost to Company, Land | $ 32,401,680 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 47,135,432 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 515,334 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 32,401,680 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 47,650,766 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 80,052,446 |  |  |
Accumulated Depreciation | (10,219,483) |  |  |
Investment in Real Estate, Net | 69,832,963 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Avenue Two [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Redwood City, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 123 |  |  |
Initial Cost to Company, Land | $ 7,995,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 18,005,000 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,509,228 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 7,995,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 20,514,228 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 28,509,228 |  |  |
Accumulated Depreciation | (8,409,710) |  |  |
Investment in Real Estate, Net | 20,099,518 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Axis at Shady Grove [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Rockville, MD |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 366 |  |  |
Initial Cost to Company, Land | $ 14,745,774 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 90,503,831 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 240,588 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 14,745,774 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 90,744,419 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 105,490,193 |  |  |
Accumulated Depreciation | (11,084,271) |  |  |
Investment in Real Estate, Net | 94,405,922 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Azure (fka Mission Bay-Block 13) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | San Francisco, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 273 |  |  |
Initial Cost to Company, Land | $ 32,855,115 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 153,567,641 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 479,066 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 32,855,115 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 154,046,707 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 186,901,822 |  |  |
Accumulated Depreciation | (30,930,604) |  |  |
Investment in Real Estate, Net | 155,971,218 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Bay Hill [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Long Beach, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 160 |  |  |
Initial Cost to Company, Land | $ 7,600,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 27,437,239 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,043,249 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 7,600,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 31,480,488 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 39,080,488 |  |  |
Accumulated Depreciation | (17,947,925) |  |  |
Investment in Real Estate, Net | 21,132,563 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Beatrice, The [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 302 |  |  |
Initial Cost to Company, Land | $ 114,351,405 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 165,648,595 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,437,470 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 114,351,405 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 168,086,065 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 282,437,470 |  |  |
Accumulated Depreciation | (56,957,402) |  |  |
Investment in Real Estate, Net | 225,480,068 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Bella Vista I, II, III Combined [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Woodland Hills, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 579 |  |  |
Initial Cost to Company, Land | $ 31,682,754 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 121,095,786 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 11,255,581 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 31,682,754 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 132,351,367 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 164,034,121 |  |  |
Accumulated Depreciation | (68,433,638) |  |  |
Investment in Real Estate, Net | 95,600,483 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Belle Arts Condominium Homes, LLC [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Bellevue, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 1 |  |  |
Initial Cost to Company, Land | $ 63,158 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 236,157 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,098 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 63,158 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 238,255 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 301,413 |  |  |
Accumulated Depreciation | (99,931) |  |  |
Investment in Real Estate, Net | 201,482 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Bella Fontaine [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Marina Del Rey, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 102 |  |  |
Initial Cost to Company, Land | $ 9,098,808 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 28,701,192 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,356,766 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 9,098,808 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 31,057,958 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 40,156,766 |  |  |
Accumulated Depreciation | (11,041,933) |  |  |
Investment in Real Estate, Net | 29,114,833 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Breakwater at Marina Del Rey [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Marina Del Rey, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 224 |  |  |
Initial Cost to Company, Land | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 73,189,262 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,420,327 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 75,609,589 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 75,609,589 |  |  |
Accumulated Depreciation | (25,201,234) |  |  |
Investment in Real Estate, Net | 50,408,355 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Briarwood (CA) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Sunnyvale, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 192 |  |  |
Initial Cost to Company, Land | $ 9,991,500 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 22,247,278 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,418,254 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 9,991,500 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 26,665,532 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 36,657,032 |  |  |
Accumulated Depreciation | (20,063,847) |  |  |
Investment in Real Estate, Net | 16,593,185 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Brodie, The [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Westminster, CO |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 312 |  |  |
Initial Cost to Company, Land | $ 8,639,904 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 79,254,618 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 685,818 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 8,639,904 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 79,940,436 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 88,580,340 |  |  |
Accumulated Depreciation | (8,800,355) |  |  |
Investment in Real Estate, Net | 79,779,985 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Brooklyner (fka 111 Lawrence) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Brooklyn, NY |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 490 |  |  |
Initial Cost to Company, Land | $ 40,099,922 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 221,438,631 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 5,139,174 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 40,099,922 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 226,577,805 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 266,677,727 |  |  |
Accumulated Depreciation | (77,766,873) |  |  |
Investment in Real Estate, Net | 188,910,854 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
C on Pico [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 94 |  |  |
Initial Cost to Company, Land | $ 17,125,766 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 28,074,234 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 607,130 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 17,125,766 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 28,681,364 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 45,807,130 |  |  |
Accumulated Depreciation | (6,042,014) |  |  |
Investment in Real Estate, Net | 39,765,116 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Carlyle Mill [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Alexandria, VA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 317 |  |  |
Initial Cost to Company, Land | $ 10,000,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 51,367,913 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 9,482,880 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 10,000,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 60,850,793 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 70,850,793 |  |  |
Accumulated Depreciation | (37,283,170) |  |  |
Investment in Real Estate, Net | 33,567,623 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Carmel Terrace [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | San Diego, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 384 |  |  |
Initial Cost to Company, Land | $ 2,288,300 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 20,596,281 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 12,821,204 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 2,288,300 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 33,417,485 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 35,705,785 |  |  |
Accumulated Depreciation | (29,568,634) |  |  |
Investment in Real Estate, Net | 6,137,151 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Cascade [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 477 |  |  |
Initial Cost to Company, Land | $ 23,751,564 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 149,384,842 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 58,556 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 23,751,564 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 149,443,398 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 173,194,962 |  |  |
Accumulated Depreciation | (20,377,508) |  |  |
Investment in Real Estate, Net | 152,817,454 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Centennial (fka Centennial Court & Centennial Tower) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 408 |  |  |
Initial Cost to Company, Land | $ 9,700,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 70,080,378 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 14,204,709 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 9,700,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 84,285,087 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 93,985,087 |  |  |
Accumulated Depreciation | (47,446,620) |  |  |
Investment in Real Estate, Net | 46,538,467 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Centre Club Combined [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Ontario, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 412 |  |  |
Initial Cost to Company, Land | $ 7,436,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 33,014,789 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 9,778,429 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 7,436,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 42,793,218 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 50,229,218 |  |  |
Accumulated Depreciation | (28,483,810) |  |  |
Investment in Real Estate, Net | 21,745,408 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Chelsea Square [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Redmond, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 113 |  |  |
Initial Cost to Company, Land | $ 3,397,100 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 9,289,074 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 3,046,308 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 3,397,100 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 12,335,382 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 15,732,482 |  |  |
Accumulated Depreciation | (9,272,305) |  |  |
Investment in Real Estate, Net | 6,460,177 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Chloe on Madison (fka 1401 E. Madison) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 137 |  |  |
Initial Cost to Company, Land | $ 10,401,958 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 53,750,777 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,916 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 10,401,958 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 53,753,693 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 64,155,651 |  |  |
Accumulated Depreciation | (2,655,541) |  |  |
Investment in Real Estate, Net | 61,500,110 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Chloe on Union (fka Chloe) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 117 |  |  |
Initial Cost to Company, Land | $ 14,835,571 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 39,359,650 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,872,330 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 14,835,571 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 42,231,980 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 57,067,551 |  |  |
Accumulated Depreciation | (6,417,475) |  |  |
Investment in Real Estate, Net | 50,650,076 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Church Corner [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Cambridge, MA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 85 |  |  |
Initial Cost to Company, Land | $ 5,220,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 16,744,643 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 3,414,899 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 5,220,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 20,159,542 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 25,379,542 |  |  |
Accumulated Depreciation | (11,781,658) |  |  |
Investment in Real Estate, Net | 13,597,884 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
City Gate at Cupertino (fka Cupertino) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Cupertino, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 311 |  |  |
Initial Cost to Company, Land | $ 40,400,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 95,937,046 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 7,718,239 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 40,400,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 103,655,285 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 144,055,285 |  |  |
Accumulated Depreciation | (33,293,690) |  |  |
Investment in Real Estate, Net | 110,761,595 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
City Square Bellevue (fka Bellevue) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Bellevue, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 191 |  |  |
Initial Cost to Company, Land | $ 15,100,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 41,876,257 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 3,956,888 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 15,100,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 45,833,145 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 60,933,145 |  |  |
Accumulated Depreciation | (15,186,445) |  |  |
Investment in Real Estate, Net | 45,746,700 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Clarendon, The [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 292 |  |  |
Initial Cost to Company, Land | $ 30,400,340 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 103,824,660 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,799,573 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 30,400,340 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 106,624,233 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 137,024,573 |  |  |
Accumulated Depreciation | (40,439,940) |  |  |
Investment in Real Estate, Net | 96,584,633 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Cleo, The [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 92 |  |  |
Initial Cost to Company, Land | $ 6,615,467 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 14,829,335 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,278,181 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 6,615,467 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 19,107,516 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 25,722,983 |  |  |
Accumulated Depreciation | (10,359,000) |  |  |
Investment in Real Estate, Net | 15,363,983 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Connecticut Heights [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 518 |  |  |
Initial Cost to Company, Land | $ 27,600,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 114,002,295 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 10,672,491 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 27,600,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 124,674,786 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 152,274,786 |  |  |
Accumulated Depreciation | (38,864,851) |  |  |
Investment in Real Estate, Net | 113,409,935 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Corcoran House at DuPont Circle (fka DuPont Circle) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 138 |  |  |
Initial Cost to Company, Land | $ 13,500,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 26,913,113 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,106,014 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 13,500,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 31,019,127 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 44,519,127 |  |  |
Accumulated Depreciation | (10,154,028) |  |  |
Investment in Real Estate, Net | 34,365,099 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Courthouse Plaza [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 396 |  |  |
Initial Cost to Company, Land | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 87,386,024 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 6,926,335 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 94,312,359 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 94,312,359 |  |  |
Accumulated Depreciation | (31,836,593) |  |  |
Investment in Real Estate, Net | 62,475,766 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Creekside (San Mateo) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | San Mateo, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 192 |  |  |
Initial Cost to Company, Land | $ 9,606,600 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 21,193,232 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 5,528,464 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 9,606,600 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 26,721,696 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 36,328,296 |  |  |
Accumulated Depreciation | (19,983,009) |  |  |
Investment in Real Estate, Net | 16,345,287 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Cronins Landing [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Waltham, MA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 281 |  |  |
Initial Cost to Company, Land | $ 32,300,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 85,119,324 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 12,705,880 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 32,300,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 97,825,204 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 130,125,204 |  |  |
Accumulated Depreciation | (31,367,886) |  |  |
Investment in Real Estate, Net | 98,757,318 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Crystal Place [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 181 |  |  |
Initial Cost to Company, Land | $ 17,200,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 47,918,975 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,101,843 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 17,200,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 52,020,818 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 69,220,818 |  |  |
Accumulated Depreciation | (17,674,647) |  |  |
Investment in Real Estate, Net | 51,546,171 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Dalton, The [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Alexandria, VA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 270 |  |  |
Initial Cost to Company, Land | $ 22,947,777 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 95,334,754 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 95,439 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 22,947,777 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 95,430,193 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 118,377,970 |  |  |
Accumulated Depreciation | (7,103,749) |  |  |
Investment in Real Estate, Net | 111,274,221 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Deerwood (SD) |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | San Diego, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 316 |  |  |
Initial Cost to Company, Land | $ 2,082,095 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 18,739,815 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 16,342,739 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 2,082,095 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 35,082,554 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 37,164,649 |  |  |
Accumulated Depreciation | (31,387,018) |  |  |
Investment in Real Estate, Net | 5,777,631 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Del Mar Ridge [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | San Diego, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 181 |  |  |
Initial Cost to Company, Land | $ 7,801,824 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 36,948,176 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,478,037 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 7,801,824 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 41,426,213 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 49,228,037 |  |  |
Accumulated Depreciation | (19,145,873) |  |  |
Investment in Real Estate, Net | 30,082,164 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Eagle Canyon [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Chino Hills, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 252 |  |  |
Initial Cost to Company, Land | $ 1,808,900 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 16,274,361 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 11,453,379 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 1,808,900 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 27,727,740 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 29,536,640 |  |  |
Accumulated Depreciation | (21,958,570) |  |  |
Investment in Real Estate, Net | 7,578,070 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Edgemont at Bethesda Metro [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Bethesda, MD |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 122 |  |  |
Initial Cost to Company, Land | $ 13,092,552 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 43,907,448 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,485,329 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 13,092,552 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 46,392,777 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 59,485,329 |  |  |
Accumulated Depreciation | (16,714,861) |  |  |
Investment in Real Estate, Net | 42,770,468 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Emerson Place [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Boston, MA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 444 |  |  |
Initial Cost to Company, Land | $ 14,855,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 57,566,636 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 36,095,829 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 14,855,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 93,662,465 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 108,517,465 |  |  |
Accumulated Depreciation | (67,775,615) |  |  |
Investment in Real Estate, Net | 40,741,850 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Encore at Sherman Oaks, The [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Sherman Oaks, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 174 |  |  |
Initial Cost to Company, Land | $ 8,700,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 25,446,003 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,521,390 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 8,700,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 29,967,393 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 38,667,393 |  |  |
Accumulated Depreciation | (11,941,930) |  |  |
Investment in Real Estate, Net | 26,725,463 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Edge, The (fka 4885 Edgemoor Lane) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Bethesda, MD |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 0 |  |  |
Initial Cost to Company, Land | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 52,311,710 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 0 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 52,311,710 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 52,311,710 |  |  |
Accumulated Depreciation | 0 |  |  |
Investment in Real Estate, Net | 52,311,710 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Eviva on Cherokee [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Denver, CO |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 274 |  |  |
Initial Cost to Company, Land | $ 10,507,626 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 100,037,204 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 512,431 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 10,507,626 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 100,549,635 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 111,057,261 |  |  |
Accumulated Depreciation | (10,488,698) |  |  |
Investment in Real Estate, Net | 100,568,563 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Fountains at Emerald Park (fka Emerald Park) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Dublin, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 324 |  |  |
Initial Cost to Company, Land | $ 25,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 83,986,217 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,735,333 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 25,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 88,721,550 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 114,621,550 |  |  |
Accumulated Depreciation | (28,555,812) |  |  |
Investment in Real Estate, Net | 86,065,738 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Fremont Center [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Fremont, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 322 |  |  |
Initial Cost to Company, Land | $ 25,800,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 78,753,114 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 5,103,474 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 25,800,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 83,856,588 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 109,656,588 |  |  |
Accumulated Depreciation | (27,673,493) |  |  |
Investment in Real Estate, Net | 81,983,095 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Gaithersburg Station [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Gaithersburg, MD |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 400 |  |  |
Initial Cost to Company, Land | $ 17,500,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 74,678,917 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,636,691 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 17,500,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 79,315,608 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 96,815,608 |  |  |
Accumulated Depreciation | (23,625,030) |  |  |
Investment in Real Estate, Net | 73,190,578 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Gallery, The [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Hermosa Beach, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 169 |  |  |
Initial Cost to Company, Land | $ 18,144,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 46,567,941 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 3,103,348 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 18,144,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 49,671,289 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 67,815,289 |  |  |
Accumulated Depreciation | (26,326,719) |  |  |
Investment in Real Estate, Net | 41,488,570 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Gateway at Malden Center [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Malden, MA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 203 |  |  |
Initial Cost to Company, Land | $ 9,209,780 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 25,722,666 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 17,360,595 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 9,209,780 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 43,083,261 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 52,293,041 |  |  |
Accumulated Depreciation | (28,698,550) |  |  |
Investment in Real Estate, Net | 23,594,491 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Geary Court Yard [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | San Francisco, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 165 |  |  |
Initial Cost to Company, Land | $ 1,722,400 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 15,471,429 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 6,286,909 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 1,722,400 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 21,758,338 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 23,480,738 |  |  |
Accumulated Depreciation | (16,463,219) |  |  |
Investment in Real Estate, Net | 7,017,519 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Girard [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Boston, MA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 160 |  |  |
Initial Cost to Company, Land | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 102,450,328 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 921,575 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 103,371,903 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 103,371,903 |  |  |
Accumulated Depreciation | (14,956,283) |  |  |
Investment in Real Estate, Net | 88,415,620 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Hampshire Place [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 259 |  |  |
Initial Cost to Company, Land | $ 10,806,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 30,335,330 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 8,663,329 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 10,806,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 38,998,659 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 49,804,659 |  |  |
Accumulated Depreciation | (21,516,455) |  |  |
Investment in Real Estate, Net | 28,288,204 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Harbor Steps [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 761 |  |  |
Initial Cost to Company, Land | $ 59,403,601 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 158,829,432 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 43,131,840 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 59,403,601 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 201,961,272 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 261,364,873 |  |  |
Accumulated Depreciation | (105,902,659) |  |  |
Investment in Real Estate, Net | 155,462,214 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Hathaway [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Long Beach, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 385 |  |  |
Initial Cost to Company, Land | $ 2,512,500 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 22,611,912 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 14,527,190 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 2,512,500 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 37,139,102 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 39,651,602 |  |  |
Accumulated Depreciation | (28,554,178) |  |  |
Investment in Real Estate, Net | 11,097,424 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Helios (fka 2nd+Pine) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 398 |  |  |
Initial Cost to Company, Land | $ 18,061,674 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 206,761,817 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 183,520 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 18,061,674 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 206,945,337 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 225,007,011 |  |  |
Accumulated Depreciation | (28,336,441) |  |  |
Investment in Real Estate, Net | 196,670,570 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Heritage at Stone Ridge [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Burlington, MA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 180 |  |  |
Initial Cost to Company, Land | $ 10,800,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 31,808,335 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 3,054,858 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 10,800,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 34,863,193 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 45,663,193 |  |  |
Accumulated Depreciation | (19,026,623) |  |  |
Investment in Real Estate, Net | 26,636,570 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Heritage Ridge [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Lynwood, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 197 |  |  |
Initial Cost to Company, Land | $ 6,895,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 18,983,597 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,683,392 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 6,895,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 23,666,989 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 30,561,989 |  |  |
Accumulated Depreciation | (12,962,130) |  |  |
Investment in Real Estate, Net | 17,599,859 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Hesby [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | North Hollywood, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 308 |  |  |
Initial Cost to Company, Land | $ 23,299,892 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 102,700,108 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,406,522 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 23,299,892 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 105,106,630 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 128,406,522 |  |  |
Accumulated Depreciation | (28,701,909) |  |  |
Investment in Real Estate, Net | 99,704,613 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Highlands at South Plainfield [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | South Plainfield, NJ |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 252 |  |  |
Initial Cost to Company, Land | $ 10,080,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 37,526,912 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,930,209 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 10,080,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 40,457,121 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 50,537,121 |  |  |
Accumulated Depreciation | (21,704,492) |  |  |
Investment in Real Estate, Net | 28,832,629 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Hikari [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 128 |  |  |
Initial Cost to Company, Land | $ 9,435,760 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 32,564,240 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,055,340 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 9,435,760 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 33,619,580 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 43,055,340 |  |  |
Accumulated Depreciation | (12,719,419) |  |  |
Investment in Real Estate, Net | 30,335,921 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Hillside ll [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Daly City, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 0 |  |  |
Initial Cost to Company, Land | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 1,892,874 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 0 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 1,892,874 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 1,892,874 |  |  |
Accumulated Depreciation | 0 |  |  |
Investment in Real Estate, Net | 1,892,874 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Hudson Crossing [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 259 |  |  |
Initial Cost to Company, Land | $ 23,420,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 69,977,699 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 3,305,385 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 23,420,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 73,283,084 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 96,703,084 |  |  |
Accumulated Depreciation | (41,028,871) |  |  |
Investment in Real Estate, Net | 55,674,213 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Hudson Pointe [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Jersey City, NJ |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 182 |  |  |
Initial Cost to Company, Land | $ 5,350,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 41,114,074 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 7,258,907 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 5,350,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 48,372,981 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 53,722,981 |  |  |
Accumulated Depreciation | (28,021,673) |  |  |
Investment in Real Estate, Net | 25,701,308 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Huxley, The [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Redwood City, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 137 |  |  |
Initial Cost to Company, Land | $ 18,775,028 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 89,336,651 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 38,505 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 18,775,028 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 89,375,156 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 108,150,184 |  |  |
Accumulated Depreciation | (7,124,237) |  |  |
Investment in Real Estate, Net | 101,025,947 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Ivory Wood [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Bothell, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 144 |  |  |
Initial Cost to Company, Land | $ 2,732,800 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 13,888,282 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,964,134 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 2,732,800 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 15,852,416 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 18,585,216 |  |  |
Accumulated Depreciation | (9,126,262) |  |  |
Investment in Real Estate, Net | 9,458,954 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Jia (fka Chinatown Gateway) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 280 |  |  |
Initial Cost to Company, Land | $ 14,791,831 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 78,218,492 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 917,303 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 14,791,831 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 79,135,795 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 93,927,626 |  |  |
Accumulated Depreciation | (25,013,639) |  |  |
Investment in Real Estate, Net | 68,913,987 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Junction 47 (fka West Seattle) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 206 |  |  |
Initial Cost to Company, Land | $ 11,726,305 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 56,584,312 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 256,046 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 11,726,305 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 56,840,358 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 68,566,663 |  |  |
Accumulated Depreciation | (12,195,811) |  |  |
Investment in Real Estate, Net | 56,370,852 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Kelvin, The (fka Modera) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Irvine, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 194 |  |  |
Initial Cost to Company, Land | $ 15,521,552 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 64,853,448 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 778,776 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 15,521,552 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 65,632,224 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 81,153,776 |  |  |
Accumulated Depreciation | (15,146,860) |  |  |
Investment in Real Estate, Net | 66,006,916 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Laguna Clara [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Santa Clara, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 264 |  |  |
Initial Cost to Company, Land | $ 13,642,420 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 31,270,480 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 7,218,616 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 13,642,420 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 38,489,096 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 52,131,516 |  |  |
Accumulated Depreciation | (21,078,780) |  |  |
Investment in Real Estate, Net | 31,052,736 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Landings at Port Imperial [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | W. New York, NJ |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 276 |  |  |
Initial Cost to Company, Land | $ 27,246,045 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 37,741,050 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 15,622,471 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 27,246,045 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 53,363,521 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 80,609,566 |  |  |
Accumulated Depreciation | (35,393,712) |  |  |
Investment in Real Estate, Net | 45,215,854 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Lane [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 217 |  |  |
Initial Cost to Company, Land | $ 13,142,946 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 71,933,303 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 65,928 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 13,142,946 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 71,999,231 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 85,142,177 |  |  |
Accumulated Depreciation | (4,558,633) |  |  |
Investment in Real Estate, Net | 80,583,544 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Lex, The [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | San Jose, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 387 |  |  |
Initial Cost to Company, Land | $ 21,817,512 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 158,778,598 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 462,150 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 21,817,512 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 159,240,748 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 181,058,260 |  |  |
Accumulated Depreciation | (15,000,565) |  |  |
Investment in Real Estate, Net | 166,057,695 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Liberty Park [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Braintree, MA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 202 |  |  |
Initial Cost to Company, Land | $ 5,977,504 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 26,749,111 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 7,808,575 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 5,977,504 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 34,557,686 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 40,535,190 |  |  |
Accumulated Depreciation | (21,422,606) |  |  |
Investment in Real Estate, Net | 19,112,584 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Liberty Tower [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 235 |  |  |
Initial Cost to Company, Land | $ 16,382,822 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 83,817,078 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,517,251 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 16,382,822 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 88,334,329 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 104,717,151 |  |  |
Accumulated Depreciation | (34,837,074) |  |  |
Investment in Real Estate, Net | 69,880,077 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Lincoln Heights [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Quincy, MA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 336 |  |  |
Initial Cost to Company, Land | $ 5,928,400 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 33,595,262 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 15,212,279 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 5,928,400 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 48,807,541 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 54,735,941 |  |  |
Accumulated Depreciation | (39,401,499) |  |  |
Investment in Real Estate, Net | 15,334,442 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Lofts at Kendall Square (fka Kendall Square) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Cambridge, MA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 186 |  |  |
Initial Cost to Company, Land | $ 18,696,674 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 78,445,657 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 7,530,710 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 18,696,674 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 85,976,367 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 104,673,041 |  |  |
Accumulated Depreciation | (27,734,674) |  |  |
Investment in Real Estate, Net | 76,938,367 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Lofts at Kendall Square ll (fka 249 Third Street) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Cambridge, MA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 84 |  |  |
Initial Cost to Company, Land | $ 4,603,326 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 44,438,432 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | (503) |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 4,603,326 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 44,437,929 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 49,041,255 |  |  |
Accumulated Depreciation | (2,109,619) |  |  |
Investment in Real Estate, Net | 46,931,636 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Longacre House [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 293 |  |  |
Initial Cost to Company, Land | $ 73,170,045 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 53,962,510 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 5,401,688 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 73,170,045 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 59,364,198 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 132,534,243 |  |  |
Accumulated Depreciation | (28,246,752) |  |  |
Investment in Real Estate, Net | 104,287,491 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Longfellow Place [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Boston, MA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 710 |  |  |
Initial Cost to Company, Land | $ 38,264,917 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 132,175,915 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 89,681,781 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 38,264,917 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 221,857,696 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 260,122,613 |  |  |
Accumulated Depreciation | (163,889,861) |  |  |
Investment in Real Estate, Net | 96,232,752 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Madox [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Jersey City, NJ |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 131 |  |  |
Initial Cost to Company, Land | $ 9,679,635 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 64,594,205 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 961,691 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 9,679,635 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 65,555,896 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 75,235,531 |  |  |
Accumulated Depreciation | (7,494,654) |  |  |
Investment in Real Estate, Net | 67,740,877 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Mantena [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 98 |  |  |
Initial Cost to Company, Land | $ 22,346,513 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 61,501,158 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,480,793 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 22,346,513 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 62,981,951 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 85,328,464 |  |  |
Accumulated Depreciation | (20,145,143) |  |  |
Investment in Real Estate, Net | 65,183,321 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Marina 41 (fka Marina Del Rey) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Marina Del Rey, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 623 |  |  |
Initial Cost to Company, Land | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 168,842,442 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 9,623,804 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 178,466,246 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 178,466,246 |  |  |
Accumulated Depreciation | (59,646,703) |  |  |
Investment in Real Estate, Net | 118,819,543 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Mariposa at Playa Del Rey (fka Playa Del Rey) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Playa Del Rey, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 354 |  |  |
Initial Cost to Company, Land | $ 60,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 89,311,482 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 7,039,392 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 60,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 96,350,874 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 157,250,874 |  |  |
Accumulated Depreciation | (31,786,197) |  |  |
Investment in Real Estate, Net | 125,464,677 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Mark on 8th [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 174 |  |  |
Initial Cost to Company, Land | $ 23,004,387 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 51,148,861 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 172,242 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 23,004,387 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 51,321,103 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 74,325,490 |  |  |
Accumulated Depreciation | (6,791,552) |  |  |
Investment in Real Estate, Net | 67,533,938 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Market Street Village [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | San Diego, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 229 |  |  |
Initial Cost to Company, Land | $ 13,740,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 40,757,301 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,627,968 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 13,740,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 43,385,269 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 57,125,269 |  |  |
Accumulated Depreciation | (22,558,686) |  |  |
Investment in Real Estate, Net | 34,566,583 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Milano Lofts [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 99 |  |  |
Initial Cost to Company, Land | $ 8,125,216 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 27,378,784 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,435,789 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 8,125,216 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 31,814,573 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 39,939,789 |  |  |
Accumulated Depreciation | (10,534,953) |  |  |
Investment in Real Estate, Net | 29,404,836 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Mill Creek [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Milpitas, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 516 |  |  |
Initial Cost to Company, Land | $ 12,858,693 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 57,168,503 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 18,006,191 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 12,858,693 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 75,174,694 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 88,033,387 |  |  |
Accumulated Depreciation | (43,305,918) |  |  |
Investment in Real Estate, Net | 44,727,469 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Mosaic at Metro [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Hyattsville, MD |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 260 |  |  |
Initial Cost to Company, Land | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 59,580,898 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,669,692 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 61,250,590 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 61,250,590 |  |  |
Accumulated Depreciation | (25,749,117) |  |  |
Investment in Real Estate, Net | 35,501,473 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Mountain View Redevelopment [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Mountain View, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 0 |  |  |
Initial Cost to Company, Land | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 1,630,338 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 0 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 1,630,338 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 1,630,338 |  |  |
Accumulated Depreciation | 0 |  |  |
Investment in Real Estate, Net | 1,630,338 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Mozaic at Union Station [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 272 |  |  |
Initial Cost to Company, Land | $ 8,500,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 52,529,446 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,595,464 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 8,500,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 55,124,910 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 63,624,910 |  |  |
Accumulated Depreciation | (27,902,570) |  |  |
Investment in Real Estate, Net | 35,722,340 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Murray Hill Tower (fka Murray Hill) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 270 |  |  |
Initial Cost to Company, Land | $ 75,800,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 102,705,401 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 11,586,703 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 75,800,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 114,292,104 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 190,092,104 |  |  |
Accumulated Depreciation | (38,926,014) |  |  |
Investment in Real Estate, Net | 151,166,090 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Next on Sixth [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 398 |  |  |
Initial Cost to Company, Land | $ 52,509,906 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 136,635,650 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 161,352 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 52,509,906 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 136,797,002 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 189,306,908 |  |  |
Accumulated Depreciation | (13,325,292) |  |  |
Investment in Real Estate, Net | 175,981,616 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
North Pier at Harborside [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Jersey City, NJ |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 297 |  |  |
Initial Cost to Company, Land | $ 4,000,159 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 94,290,590 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 7,943,309 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 4,000,159 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 102,233,899 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 106,234,058 |  |  |
Accumulated Depreciation | (57,060,669) |  |  |
Investment in Real Estate, Net | 49,173,389 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Northglen [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Valencia, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 234 |  |  |
Initial Cost to Company, Land | $ 9,360,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 20,778,553 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 7,159,183 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 9,360,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 27,937,736 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 37,297,736 |  |  |
Accumulated Depreciation | (17,739,770) |  |  |
Investment in Real Estate, Net | 19,557,966 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Northpark [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Burlingame, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 510 |  |  |
Initial Cost to Company, Land | $ 38,607,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 77,472,217 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 15,619,323 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 38,607,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 93,091,540 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 131,698,540 |  |  |
Accumulated Depreciation | (43,765,024) |  |  |
Investment in Real Estate, Net | 87,933,516 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Notch [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Newcastle, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 158 |  |  |
Initial Cost to Company, Land | $ 5,463,324 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 43,490,989 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 5,378 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 5,463,324 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 43,496,367 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 48,959,691 |  |  |
Accumulated Depreciation | (1,267,355) |  |  |
Investment in Real Estate, Net | 47,692,336 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Oak Park Combined [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Agoura Hills, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 444 |  |  |
Initial Cost to Company, Land | $ 3,390,700 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 30,517,274 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 11,540,745 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 3,390,700 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 42,058,019 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 45,448,719 |  |  |
Accumulated Depreciation | (35,268,612) |  |  |
Investment in Real Estate, Net | 10,180,107 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Oaks [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Santa Clarita, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 520 |  |  |
Initial Cost to Company, Land | $ 23,400,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 61,020,438 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 8,845,874 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 23,400,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 69,866,312 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 93,266,312 |  |  |
Accumulated Depreciation | (41,469,709) |  |  |
Investment in Real Estate, Net | 51,796,603 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Oakwood Crystal City [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 162 |  |  |
Initial Cost to Company, Land | $ 15,400,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 35,474,336 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,223,339 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 15,400,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 39,697,675 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 55,097,675 |  |  |
Accumulated Depreciation | (13,360,668) |  |  |
Investment in Real Estate, Net | 41,737,007 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Ocean Crest [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Solana Beach, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 146 |  |  |
Initial Cost to Company, Land | $ 5,111,200 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 11,910,438 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 5,063,378 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 5,111,200 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 16,973,816 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 22,085,016 |  |  |
Accumulated Depreciation | (12,541,852) |  |  |
Investment in Real Estate, Net | 9,543,164 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Odin (fka Tallman) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 301 |  |  |
Initial Cost to Company, Land | $ 16,807,519 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 64,519,515 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 95,579 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 16,807,519 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 64,615,094 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 81,422,613 |  |  |
Accumulated Depreciation | (13,686,832) |  |  |
Investment in Real Estate, Net | 67,735,781 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
One Henry Adams [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | San Francisco, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 241 |  |  |
Initial Cost to Company, Land | $ 30,224,393 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 139,564,405 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 75,093 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 30,224,393 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 139,639,498 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 169,863,891 |  |  |
Accumulated Depreciation | (22,296,095) |  |  |
Investment in Real Estate, Net | 147,567,796 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
One India Street (fka Oakwood Boston) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Boston, MA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 94 |  |  |
Initial Cost to Company, Land | $ 22,200,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 28,672,979 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 6,922,941 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 22,200,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 35,595,920 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 57,795,920 |  |  |
Accumulated Depreciation | (11,405,705) |  |  |
Investment in Real Estate, Net | 46,390,215 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Pacific Place [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 430 |  |  |
Initial Cost to Company, Land | $ 32,250,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 110,750,000 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,166,746 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 32,250,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 112,916,746 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 145,166,746 |  |  |
Accumulated Depreciation | (35,114,578) |  |  |
Investment in Real Estate, Net | 110,052,168 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Packard Building [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 61 |  |  |
Initial Cost to Company, Land | $ 5,911,041 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 19,954,959 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,230,863 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 5,911,041 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 21,185,822 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 27,096,863 |  |  |
Accumulated Depreciation | (4,881,973) |  |  |
Investment in Real Estate, Net | 22,214,890 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Parc 77 [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 137 |  |  |
Initial Cost to Company, Land | $ 40,504,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 18,025,679 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 6,888,757 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 40,504,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 24,914,436 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 65,418,436 |  |  |
Accumulated Depreciation | (14,944,137) |  |  |
Investment in Real Estate, Net | 50,474,299 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Parc Cameron [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 166 |  |  |
Initial Cost to Company, Land | $ 37,600,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 9,855,597 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 7,768,599 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 37,600,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 17,624,196 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 55,224,196 |  |  |
Accumulated Depreciation | (12,262,578) |  |  |
Investment in Real Estate, Net | 42,961,618 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Parc Coliseum [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 177 |  |  |
Initial Cost to Company, Land | $ 52,654,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 23,045,751 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 9,759,837 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 52,654,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 32,805,588 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 85,459,588 |  |  |
Accumulated Depreciation | (20,290,750) |  |  |
Investment in Real Estate, Net | 65,168,838 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Parc East Towers [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 324 |  |  |
Initial Cost to Company, Land | $ 102,163,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 108,989,402 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 13,101,902 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 102,163,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 122,091,304 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 224,254,304 |  |  |
Accumulated Depreciation | (60,987,908) |  |  |
Investment in Real Estate, Net | 163,266,396 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Parc on Powell (fka Parkside at Emeryville) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Emeryville, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 173 |  |  |
Initial Cost to Company, Land | $ 16,667,059 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 65,100,751 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 753,908 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 16,667,059 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 65,854,659 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 82,521,718 |  |  |
Accumulated Depreciation | (14,664,513) |  |  |
Investment in Real Estate, Net | 67,857,205 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Park Connecticut [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 142 |  |  |
Initial Cost to Company, Land | $ 13,700,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 59,087,519 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,161,224 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 13,700,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 61,248,743 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 74,948,743 |  |  |
Accumulated Depreciation | (18,692,087) |  |  |
Investment in Real Estate, Net | 56,256,656 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Park West (CA) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 444 |  |  |
Initial Cost to Company, Land | $ 3,033,500 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 27,302,383 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 12,931,215 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 3,033,500 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 40,233,598 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 43,267,098 |  |  |
Accumulated Depreciation | (32,562,373) |  |  |
Investment in Real Estate, Net | 10,704,725 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Parkside [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Union City, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 208 |  |  |
Initial Cost to Company, Land | $ 6,246,700 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 11,827,453 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 8,446,035 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 6,246,700 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 20,273,488 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 26,520,188 |  |  |
Accumulated Depreciation | (14,157,450) |  |  |
Investment in Real Estate, Net | 12,362,738 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Pearl, The (WA) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 80 |  |  |
Initial Cost to Company, Land | $ 6,972,585 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 26,527,415 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,126,346 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 6,972,585 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 27,653,761 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 34,626,346 |  |  |
Accumulated Depreciation | (6,325,802) |  |  |
Investment in Real Estate, Net | 28,300,544 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Pearl MDR (fka Oakwood Marina Del Rey) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Marina Del Rey, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 597 |  |  |
Initial Cost to Company, Land | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 120,795,359 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 6,550,150 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 127,345,509 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 127,345,509 |  |  |
Accumulated Depreciation | (43,885,705) |  |  |
Investment in Real Estate, Net | 83,459,804 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Pegasus [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 322 |  |  |
Initial Cost to Company, Land | $ 18,094,052 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 81,905,948 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 7,302,934 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 18,094,052 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 89,208,882 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 107,302,934 |  |  |
Accumulated Depreciation | (35,775,990) |  |  |
Investment in Real Estate, Net | 71,526,944 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Playa Pacifica [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Hermosa Beach, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 285 |  |  |
Initial Cost to Company, Land | $ 35,100,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 33,473,822 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 24,084,348 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 35,100,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 57,558,170 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 92,658,170 |  |  |
Accumulated Depreciation | (34,060,220) |  |  |
Investment in Real Estate, Net | 58,597,950 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Portofino [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Chino Hills, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 176 |  |  |
Initial Cost to Company, Land | $ 3,572,400 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 14,660,994 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 3,963,453 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 3,572,400 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 18,624,447 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 22,196,847 |  |  |
Accumulated Depreciation | (14,859,876) |  |  |
Investment in Real Estate, Net | 7,336,971 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Portofino (Val) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Valencia, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 216 |  |  |
Initial Cost to Company, Land | $ 8,640,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 21,487,126 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 6,277,627 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 8,640,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 27,764,753 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 36,404,753 |  |  |
Accumulated Depreciation | (18,614,995) |  |  |
Investment in Real Estate, Net | 17,789,758 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Portside Towers [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Jersey City, NJ |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 527 |  |  |
Initial Cost to Company, Land | $ 22,487,006 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 96,842,913 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 26,069,539 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 22,487,006 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 122,912,452 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 145,399,458 |  |  |
Accumulated Depreciation | (93,853,487) |  |  |
Investment in Real Estate, Net | 51,545,971 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Potrero 1010 [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | San Francisco, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 453 |  |  |
Initial Cost to Company, Land | $ 40,830,011 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 181,855,868 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 989,838 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 40,830,011 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 182,845,706 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 223,675,717 |  |  |
Accumulated Depreciation | (33,782,465) |  |  |
Investment in Real Estate, Net | 189,893,252 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Prado (fka Glendale) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Glendale, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 264 |  |  |
Initial Cost to Company, Land | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 67,977,313 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 6,662,673 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 74,639,986 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 74,639,986 |  |  |
Accumulated Depreciation | (24,014,696) |  |  |
Investment in Real Estate, Net | 50,625,290 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Prime, The [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 281 |  |  |
Initial Cost to Company, Land | $ 34,625,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 77,879,740 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,771,834 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 34,625,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 82,651,574 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 117,276,574 |  |  |
Accumulated Depreciation | (35,430,836) |  |  |
Investment in Real Estate, Net | 81,845,738 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Prism at Park Avenue South (fka 400 Park Aveue South (EQR)) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 269 |  |  |
Initial Cost to Company, Land | $ 76,292,169 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 171,726,887 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 231,618 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 76,292,169 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 171,958,505 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 248,250,674 |  |  |
Accumulated Depreciation | (38,979,951) |  |  |
Investment in Real Estate, Net | 209,270,723 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Promenade at Town Center I & II [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Valencia, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 564 |  |  |
Initial Cost to Company, Land | $ 28,200,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 69,795,915 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 12,726,006 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 28,200,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 82,521,921 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 110,721,921 |  |  |
Accumulated Depreciation | (47,521,592) |  |  |
Investment in Real Estate, Net | 63,200,329 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Providence [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Bothell, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 200 |  |  |
Initial Cost to Company, Land | $ 3,573,621 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 19,055,505 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 5,058,503 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 3,573,621 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 24,114,008 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 27,687,629 |  |  |
Accumulated Depreciation | (13,078,610) |  |  |
Investment in Real Estate, Net | 14,609,019 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Quarry Hills [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Quincy, MA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 316 |  |  |
Initial Cost to Company, Land | $ 26,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 84,411,162 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,822,863 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 26,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 89,234,025 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 116,134,025 |  |  |
Accumulated Depreciation | (28,874,667) |  |  |
Investment in Real Estate, Net | 87,259,358 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Radius Uptown [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Denver, CO |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 372 |  |  |
Initial Cost to Company, Land | $ 13,644,960 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 121,899,084 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,070,656 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 13,644,960 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 122,969,740 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 136,614,700 |  |  |
Accumulated Depreciation | (14,861,159) |  |  |
Investment in Real Estate, Net | 121,753,541 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Red 160 (fka Redmond Way) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Redmond, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 250 |  |  |
Initial Cost to Company, Land | $ 15,546,376 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 65,320,010 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,554,405 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 15,546,376 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 66,874,415 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 82,420,791 |  |  |
Accumulated Depreciation | (22,940,448) |  |  |
Investment in Real Estate, Net | 59,480,343 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Redmond Court [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Bellevue, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 206 |  |  |
Initial Cost to Company, Land | $ 10,300,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 33,488,745 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,923,709 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 10,300,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 35,412,454 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 45,712,454 |  |  |
Accumulated Depreciation | (12,697,765) |  |  |
Investment in Real Estate, Net | 33,014,689 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Regency Palms [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Huntington Beach, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 310 |  |  |
Initial Cost to Company, Land | $ 1,857,400 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 16,713,254 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 8,166,256 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 1,857,400 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 24,879,510 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 26,736,910 |  |  |
Accumulated Depreciation | (20,072,599) |  |  |
Investment in Real Estate, Net | 6,664,311 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Reserve at Clarendon Centre, The [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 252 |  |  |
Initial Cost to Company, Land | $ 10,500,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 52,812,935 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 5,015,196 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 10,500,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 57,828,131 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 68,328,131 |  |  |
Accumulated Depreciation | (34,812,389) |  |  |
Investment in Real Estate, Net | 33,515,742 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Reserve at Eisenhower, The [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Alexandria, VA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 226 |  |  |
Initial Cost to Company, Land | $ 6,500,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 34,585,060 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 5,104,139 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 6,500,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 39,689,199 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 46,189,199 |  |  |
Accumulated Depreciation | (23,797,415) |  |  |
Investment in Real Estate, Net | 22,391,784 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Reserve at Empire Lakes [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Rancho Cucamonga, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 467 |  |  |
Initial Cost to Company, Land | $ 16,345,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 73,080,670 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 5,402,223 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 16,345,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 78,482,893 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 94,827,893 |  |  |
Accumulated Depreciation | (41,826,076) |  |  |
Investment in Real Estate, Net | 53,001,817 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Reserve at Fairfax Corner [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Fairfax, VA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 652 |  |  |
Initial Cost to Company, Land | $ 15,804,057 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 63,129,051 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 13,200,537 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 15,804,057 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 76,329,588 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 92,133,645 |  |  |
Accumulated Depreciation | (47,641,317) |  |  |
Investment in Real Estate, Net | 44,492,328 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Reserve at Mountain View (fka Mountain View) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Mountain View, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 180 |  |  |
Initial Cost to Company, Land | $ 27,000,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 33,029,605 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 7,682,065 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 27,000,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 40,711,670 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 67,711,670 |  |  |
Accumulated Depreciation | (14,792,142) |  |  |
Investment in Real Estate, Net | 52,919,528 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Reserve at Potomac Yard [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Alexandria, VA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 588 |  |  |
Initial Cost to Company, Land | $ 11,918,917 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 68,862,641 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 18,128,215 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 11,918,917 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 86,990,856 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 98,909,773 |  |  |
Accumulated Depreciation | (49,807,938) |  |  |
Investment in Real Estate, Net | 49,101,835 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Reserve at Town Center I-III (WA) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Mill Creek, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 584 |  |  |
Initial Cost to Company, Land | $ 16,768,705 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 77,623,664 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 9,950,448 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 16,768,705 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 87,574,112 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 104,342,817 |  |  |
Accumulated Depreciation | (39,942,888) |  |  |
Investment in Real Estate, Net | 64,399,929 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Residences at Westgate I (fka Westgate II) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Pasadena, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 252 |  |  |
Initial Cost to Company, Land | $ 17,859,785 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 109,261,438 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 603,327 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 17,859,785 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 109,864,765 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 127,724,550 |  |  |
Accumulated Depreciation | (30,747,047) |  |  |
Investment in Real Estate, Net | 96,977,503 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Residences at Westgate II (fka Westgate III) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Pasadena, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 88 |  |  |
Initial Cost to Company, Land | $ 12,118,248 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 40,486,467 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 119,401 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 12,118,248 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 40,605,868 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 52,724,116 |  |  |
Accumulated Depreciation | (9,059,400) |  |  |
Investment in Real Estate, Net | 43,664,716 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Rianna I & II [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 156 |  |  |
Initial Cost to Company, Land | $ 4,430,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 29,298,096 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,594,173 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 4,430,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 30,892,269 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 35,322,269 |  |  |
Accumulated Depreciation | (13,558,016) |  |  |
Investment in Real Estate, Net | 21,764,253 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Ridgewood Village I&II [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | San Diego, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 408 |  |  |
Initial Cost to Company, Land | $ 11,809,500 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 34,004,048 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 6,762,215 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 11,809,500 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 40,766,263 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 52,575,763 |  |  |
Accumulated Depreciation | (29,418,122) |  |  |
Investment in Real Estate, Net | 23,157,641 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Riva Terra I (fka Redwood Shores) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Redwood City, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 304 |  |  |
Initial Cost to Company, Land | $ 34,963,355 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 84,587,658 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 8,097,405 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 34,963,355 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 92,685,063 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 127,648,418 |  |  |
Accumulated Depreciation | (31,553,572) |  |  |
Investment in Real Estate, Net | 96,094,846 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Riva Terra II (fka Harborside) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Redwood City, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 149 |  |  |
Initial Cost to Company, Land | $ 17,136,645 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 40,536,531 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,063,635 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 17,136,645 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 44,600,166 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 61,736,811 |  |  |
Accumulated Depreciation | (13,928,284) |  |  |
Investment in Real Estate, Net | 47,808,527 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Riverpark [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Redmond, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 321 |  |  |
Initial Cost to Company, Land | $ 14,355,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 80,894,049 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,803,736 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 14,355,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 85,697,785 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 100,052,785 |  |  |
Accumulated Depreciation | (30,548,447) |  |  |
Investment in Real Estate, Net | 69,504,338 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Rivington, The [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Hoboken, NJ |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 240 |  |  |
Initial Cost to Company, Land | $ 34,340,640 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 112,730,596 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 3,283,711 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 34,340,640 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 116,014,307 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 150,354,947 |  |  |
Accumulated Depreciation | (15,662,554) |  |  |
Investment in Real Estate, Net | 134,692,393 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Rosecliff II [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Quincy, MA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 130 |  |  |
Initial Cost to Company, Land | $ 4,922,840 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 30,202,160 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,801,272 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 4,922,840 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 32,003,432 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 36,926,272 |  |  |
Accumulated Depreciation | (12,228,816) |  |  |
Investment in Real Estate, Net | 24,697,456 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Sakura Crossing [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 230 |  |  |
Initial Cost to Company, Land | $ 14,641,990 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 42,858,010 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,561,995 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 14,641,990 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 44,420,005 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 59,061,995 |  |  |
Accumulated Depreciation | (17,561,315) |  |  |
Investment in Real Estate, Net | 41,500,680 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Saxton [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 325 |  |  |
Initial Cost to Company, Land | $ 38,805,400 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 128,652,023 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 373,996 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 38,805,400 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 129,026,019 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 167,831,419 |  |  |
Accumulated Depreciation | (9,518,028) |  |  |
Investment in Real Estate, Net | 158,313,391 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Seventh & James [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 96 |  |  |
Initial Cost to Company, Land | $ 663,800 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 5,974,803 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,639,194 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 663,800 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 10,613,997 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 11,277,797 |  |  |
Accumulated Depreciation | (8,600,004) |  |  |
Investment in Real Estate, Net | 2,677,793 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Sheffield Court [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 597 |  |  |
Initial Cost to Company, Land | $ 3,342,381 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 31,337,332 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 18,847,422 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 3,342,381 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 50,184,754 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 53,527,135 |  |  |
Accumulated Depreciation | (41,685,265) |  |  |
Investment in Real Estate, Net | 11,841,870 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Siena Terrace [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Lake Forest, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 356 |  |  |
Initial Cost to Company, Land | $ 8,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 24,083,024 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 8,661,820 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 8,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 32,744,844 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 41,644,844 |  |  |
Accumulated Depreciation | (24,001,604) |  |  |
Investment in Real Estate, Net | 17,643,240 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Skycrest [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Valencia, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 264 |  |  |
Initial Cost to Company, Land | $ 10,560,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 25,574,457 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 6,581,900 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 10,560,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 32,156,357 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 42,716,357 |  |  |
Accumulated Depreciation | (21,036,234) |  |  |
Investment in Real Estate, Net | 21,680,123 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Skylark [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Union City, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 174 |  |  |
Initial Cost to Company, Land | $ 1,781,600 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 16,731,916 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 5,763,877 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 1,781,600 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 22,495,793 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 24,277,393 |  |  |
Accumulated Depreciation | (16,357,971) |  |  |
Investment in Real Estate, Net | 7,919,422 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Skyview [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Rancho Santa Margarita, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 260 |  |  |
Initial Cost to Company, Land | $ 3,380,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 21,952,863 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 6,109,768 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 3,380,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 28,062,631 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 31,442,631 |  |  |
Accumulated Depreciation | (20,168,570) |  |  |
Investment in Real Estate, Net | 11,274,061 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
SoMa II [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | San Francisco, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 0 |  |  |
Initial Cost to Company, Land | $ 29,406,606 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 5,913,784 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 0 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 29,406,606 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 5,913,784 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 35,320,390 |  |  |
Accumulated Depreciation | 0 |  |  |
Investment in Real Estate, Net | 35,320,390 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Sonterra at Foothill Ranch [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Foothill Ranch, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 300 |  |  |
Initial Cost to Company, Land | $ 7,503,400 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 24,048,507 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 6,242,034 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 7,503,400 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 30,290,541 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 37,793,941 |  |  |
Accumulated Depreciation | (22,570,636) |  |  |
Investment in Real Estate, Net | 15,223,305 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
South City Station (fka South San Francisco) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | San Francisco, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 368 |  |  |
Initial Cost to Company, Land | $ 68,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 79,476,861 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 5,874,314 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 68,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 85,351,175 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 154,251,175 |  |  |
Accumulated Depreciation | (27,619,642) |  |  |
Investment in Real Estate, Net | 126,631,533 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Southwood [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Palo Alto, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 100 |  |  |
Initial Cost to Company, Land | $ 6,936,600 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 14,324,069 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 7,029,392 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 6,936,600 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 21,353,461 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 28,290,061 |  |  |
Accumulated Depreciation | (14,889,800) |  |  |
Investment in Real Estate, Net | 13,400,261 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Springline [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 136 |  |  |
Initial Cost to Company, Land | $ 9,163,667 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 47,910,981 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 462,653 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 9,163,667 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 48,373,634 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 57,537,301 |  |  |
Accumulated Depreciation | (8,167,981) |  |  |
Investment in Real Estate, Net | 49,369,320 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
STOA [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 237 |  |  |
Initial Cost to Company, Land | $ 25,326,048 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 79,976,031 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 466,898 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 25,326,048 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 80,442,929 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 105,768,977 |  |  |
Accumulated Depreciation | (8,160,539) |  |  |
Investment in Real Estate, Net | 97,608,438 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Summerset Village [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Chatsworth, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 280 |  |  |
Initial Cost to Company, Land | $ 2,890,450 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 23,670,889 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 8,738,634 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 2,890,450 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 32,409,523 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 35,299,973 |  |  |
Accumulated Depreciation | (26,387,722) |  |  |
Investment in Real Estate, Net | 8,912,251 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Summit at Sausalito (fka Sausalito) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Sausalito, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 198 |  |  |
Initial Cost to Company, Land | $ 26,000,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 28,435,024 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 9,988,645 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 26,000,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 38,423,669 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 64,423,669 |  |  |
Accumulated Depreciation | (15,803,477) |  |  |
Investment in Real Estate, Net | 48,620,192 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Ten23 (fka 500 West 23rd Street) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 111 |  |  |
Initial Cost to Company, Land | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 58,881,873 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,160,581 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 60,042,454 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 60,042,454 |  |  |
Accumulated Depreciation | (18,298,459) |  |  |
Investment in Real Estate, Net | 41,743,995 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Terraces, The [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | San Francisco, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 117 |  |  |
Initial Cost to Company, Land | $ 14,087,610 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 16,314,151 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,504,676 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 14,087,610 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 18,818,827 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 32,906,437 |  |  |
Accumulated Depreciation | (7,920,298) |  |  |
Investment in Real Estate, Net | 24,986,139 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Third Square [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Cambridge, MA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 471 |  |  |
Initial Cost to Company, Land | $ 26,767,171 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 218,822,728 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 9,395,974 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 26,767,171 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 228,218,702 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 254,985,873 |  |  |
Accumulated Depreciation | (94,757,814) |  |  |
Investment in Real Estate, Net | 160,228,059 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Three20 [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 134 |  |  |
Initial Cost to Company, Land | $ 7,030,766 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 29,005,762 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 969,854 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 7,030,766 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 29,975,616 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 37,006,382 |  |  |
Accumulated Depreciation | (8,984,046) |  |  |
Investment in Real Estate, Net | 28,022,336 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Toscana [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Irvine, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 563 |  |  |
Initial Cost to Company, Land | $ 39,410,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 50,806,072 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 25,605,818 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 39,410,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 76,411,890 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 115,821,890 |  |  |
Accumulated Depreciation | (48,052,411) |  |  |
Investment in Real Estate, Net | 67,769,479 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Troy Boston [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Boston, MA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 378 |  |  |
Initial Cost to Company, Land | $ 34,641,051 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 181,607,331 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,157,467 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 34,641,051 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 183,764,798 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 218,405,849 |  |  |
Accumulated Depreciation | (23,789,711) |  |  |
Investment in Real Estate, Net | 194,616,138 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Urbana (fka Market Street Landing) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 289 |  |  |
Initial Cost to Company, Land | $ 12,542,418 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 75,800,090 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,625,630 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 12,542,418 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 78,425,720 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 90,968,138 |  |  |
Accumulated Depreciation | (23,312,467) |  |  |
Investment in Real Estate, Net | 67,655,671 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Town Square at Mark Center I&II [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Alexandria, VA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 678 |  |  |
Initial Cost to Company, Land | $ 39,928,464 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 141,208,321 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 14,623,345 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 39,928,464 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 155,831,666 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 195,760,130 |  |  |
Accumulated Depreciation | (76,590,730) |  |  |
Investment in Real Estate, Net | 119,169,400 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Uwajimaya Village [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 176 |  |  |
Initial Cost to Company, Land | $ 8,800,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 22,188,288 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 5,060,085 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 8,800,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 27,248,373 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 36,048,373 |  |  |
Accumulated Depreciation | (13,875,497) |  |  |
Investment in Real Estate, Net | 22,172,876 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Veloce [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Redmond, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 322 |  |  |
Initial Cost to Company, Land | $ 15,322,724 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 76,176,594 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,058,051 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 15,322,724 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 78,234,645 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 93,557,369 |  |  |
Accumulated Depreciation | (25,659,124) |  |  |
Investment in Real Estate, Net | 67,898,245 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Venue at the Promenade [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Castle Rock, CO |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 312 |  |  |
Initial Cost to Company, Land | $ 8,355,048 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 83,752,689 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 166,209 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 8,355,048 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 83,918,898 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 92,273,946 |  |  |
Accumulated Depreciation | (7,716,962) |  |  |
Investment in Real Estate, Net | 84,556,984 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Verde Condominium Homes (fka Mission Verde, LLC) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | San Jose, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 108 |  |  |
Initial Cost to Company, Land | $ 5,190,700 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 9,679,109 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,635,959 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 5,190,700 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 14,315,068 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 19,505,768 |  |  |
Accumulated Depreciation | (11,286,870) |  |  |
Investment in Real Estate, Net | 8,218,898 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Veridian (fka Silver Spring) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Silver Spring, MD |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 457 |  |  |
Initial Cost to Company, Land | $ 18,539,817 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 130,407,365 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,297,795 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 18,539,817 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 134,705,160 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 153,244,977 |  |  |
Accumulated Depreciation | (53,262,783) |  |  |
Investment in Real Estate, Net | 99,982,194 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Versailles [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Woodland Hills, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 253 |  |  |
Initial Cost to Company, Land | $ 12,650,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 33,656,292 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 8,575,157 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 12,650,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 42,231,449 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 54,881,449 |  |  |
Accumulated Depreciation | (26,065,056) |  |  |
Investment in Real Estate, Net | 28,816,393 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Versailles (K-Town) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 225 |  |  |
Initial Cost to Company, Land | $ 10,590,975 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 44,409,025 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,913,803 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 10,590,975 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 46,322,828 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 56,913,803 |  |  |
Accumulated Depreciation | (20,170,940) |  |  |
Investment in Real Estate, Net | 36,742,863 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Victor on Venice [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 115 |  |  |
Initial Cost to Company, Land | $ 10,350,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 35,433,437 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,023,741 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 10,350,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 37,457,178 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 47,807,178 |  |  |
Accumulated Depreciation | (18,425,633) |  |  |
Investment in Real Estate, Net | 29,381,545 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Villa Solana [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Laguna Hills, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 272 |  |  |
Initial Cost to Company, Land | $ 1,665,100 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 14,985,678 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 12,946,281 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 1,665,100 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 27,931,959 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 29,597,059 |  |  |
Accumulated Depreciation | (23,035,555) |  |  |
Investment in Real Estate, Net | 6,561,504 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Village at Del Mar Heights, The (fka Del Mar Heights) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | San Diego, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 168 |  |  |
Initial Cost to Company, Land | $ 15,100,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 40,859,396 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 3,573,169 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 15,100,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 44,432,565 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 59,532,565 |  |  |
Accumulated Depreciation | (15,023,903) |  |  |
Investment in Real Estate, Net | 44,508,662 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Virginia Square [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 231 |  |  |
Initial Cost to Company, Land | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 85,940,003 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 6,137,694 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 92,077,697 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 92,077,697 |  |  |
Accumulated Depreciation | (29,622,313) |  |  |
Investment in Real Estate, Net | 62,455,384 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Vista 99 (fka Tasman) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | San Jose, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 554 |  |  |
Initial Cost to Company, Land | $ 27,709,329 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 177,555,213 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 840,226 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 27,709,329 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 178,395,439 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 206,104,768 |  |  |
Accumulated Depreciation | (33,946,303) |  |  |
Investment in Real Estate, Net | 172,158,465 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Vista Del Lago [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Mission Viejo, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 608 |  |  |
Initial Cost to Company, Land | $ 4,525,800 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 40,736,293 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 19,765,337 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 4,525,800 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 60,501,630 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 65,027,430 |  |  |
Accumulated Depreciation | (52,909,405) |  |  |
Investment in Real Estate, Net | 12,118,025 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Walden Park [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Cambridge, MA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 232 |  |  |
Initial Cost to Company, Land | $ 12,448,888 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 52,044,448 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,982,240 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 12,448,888 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 57,026,688 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 69,475,576 |  |  |
Accumulated Depreciation | (23,325,875) |  |  |
Investment in Real Estate, Net | 46,149,701 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Water Park Towers [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 362 |  |  |
Initial Cost to Company, Land | $ 34,400,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 108,485,859 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 10,793,415 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 34,400,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 119,279,274 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 153,679,274 |  |  |
Accumulated Depreciation | (39,652,580) |  |  |
Investment in Real Estate, Net | 114,026,694 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Watertown Square [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Watertown, MA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 134 |  |  |
Initial Cost to Company, Land | $ 16,800,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 34,074,056 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,904,484 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 16,800,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 35,978,540 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 52,778,540 |  |  |
Accumulated Depreciation | (11,625,233) |  |  |
Investment in Real Estate, Net | 41,153,307 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
West 96th [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 207 |  |  |
Initial Cost to Company, Land | $ 84,800,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 67,055,502 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 6,658,093 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 84,800,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 73,713,595 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 158,513,595 |  |  |
Accumulated Depreciation | (26,104,839) |  |  |
Investment in Real Estate, Net | 132,408,756 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
West End Apartments (fka Emerson Place/CRP II) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Boston, MA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 310 |  |  |
Initial Cost to Company, Land | $ 469,546 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 163,123,022 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 5,461,544 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 469,546 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 168,584,566 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 169,054,112 |  |  |
Accumulated Depreciation | (73,099,324) |  |  |
Investment in Real Estate, Net | 95,954,788 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Westchester at Rockville [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Rockville, MD |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 192 |  |  |
Initial Cost to Company, Land | $ 10,600,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 44,135,207 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,316,004 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 10,600,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 45,451,211 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 56,051,211 |  |  |
Accumulated Depreciation | (14,255,122) |  |  |
Investment in Real Estate, Net | 41,796,089 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Westmont [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 163 |  |  |
Initial Cost to Company, Land | $ 64,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 61,143,259 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 6,257,673 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 64,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 67,400,932 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 132,300,932 |  |  |
Accumulated Depreciation | (21,887,315) |  |  |
Investment in Real Estate, Net | 110,413,617 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Westside [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 204 |  |  |
Initial Cost to Company, Land | $ 34,200,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 56,962,630 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 3,357,625 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 34,200,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 60,320,255 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 94,520,255 |  |  |
Accumulated Depreciation | (19,197,241) |  |  |
Investment in Real Estate, Net | 75,323,014 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Westside Barrington (fka Westside Villas III) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 36 |  |  |
Initial Cost to Company, Land | $ 3,060,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 5,538,871 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,182,445 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 3,060,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 6,721,316 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 9,781,316 |  |  |
Accumulated Depreciation | (4,457,210) |  |  |
Investment in Real Estate, Net | 5,324,106 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Westside Barry (Westside Villas VI) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 18 |  |  |
Initial Cost to Company, Land | $ 1,530,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 3,023,523 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 764,582 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 1,530,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 3,788,105 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 5,318,105 |  |  |
Accumulated Depreciation | (2,501,385) |  |  |
Investment in Real Estate, Net | 2,816,720 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Westside Beloit (fka Westside Villas I) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 21 |  |  |
Initial Cost to Company, Land | $ 1,785,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 3,233,254 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 778,767 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 1,785,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 4,012,021 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 5,797,021 |  |  |
Accumulated Depreciation | (2,711,404) |  |  |
Investment in Real Estate, Net | 3,085,617 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Westside Bundy (fka Westside Villas II) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 23 |  |  |
Initial Cost to Company, Land | $ 1,955,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 3,541,435 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 794,239 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 1,955,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 4,335,674 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 6,290,674 |  |  |
Accumulated Depreciation | (2,865,440) |  |  |
Investment in Real Estate, Net | 3,425,234 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Westside Butler (fka Westside Villas IV) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 36 |  |  |
Initial Cost to Company, Land | $ 3,060,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 5,539,390 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,223,921 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 3,060,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 6,763,311 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 9,823,311 |  |  |
Accumulated Depreciation | (4,471,969) |  |  |
Investment in Real Estate, Net | 5,351,342 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Westside Villas (fka Westside Villas V &VII) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 113 |  |  |
Initial Cost to Company, Land | $ 9,605,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 19,983,385 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,909,316 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 9,605,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 22,892,701 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 32,497,701 |  |  |
Accumulated Depreciation | (14,993,719) |  |  |
Investment in Real Estate, Net | 17,503,982 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Windridge (CA) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Laguna Niguel, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 344 |  |  |
Initial Cost to Company, Land | $ 2,662,900 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 23,985,497 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 13,127,981 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 2,662,900 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 37,113,478 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 39,776,378 |  |  |
Accumulated Depreciation | (30,933,234) |  |  |
Investment in Real Estate, Net | 8,843,144 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Wood Creek I [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Pleasant Hill, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 256 |  |  |
Initial Cost to Company, Land | $ 9,729,900 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 23,009,768 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 10,421,107 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 9,729,900 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 33,430,875 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 43,160,775 |  |  |
Accumulated Depreciation | (25,852,279) |  |  |
Investment in Real Estate, Net | 17,308,496 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Woodleaf [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Campbell, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 178 |  |  |
Initial Cost to Company, Land | $ 8,550,600 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 16,988,182 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 6,182,183 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 8,550,600 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 23,170,365 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 31,720,965 |  |  |
Accumulated Depreciation | (17,242,110) |  |  |
Investment in Real Estate, Net | 14,478,855 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Management Business [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Chicago, IL |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 0 |  |  |
Initial Cost to Company, Land | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 0 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 138,223,005 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 138,223,005 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 138,223,005 |  |  |
Accumulated Depreciation | (104,607,870) |  |  |
Investment in Real Estate, Net | 33,615,135 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Operating Partnership [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Chicago, IL |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 0 |  |  |
Initial Cost to Company, Land | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 1,543,343 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 0 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 1,543,343 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 1,543,343 |  |  |
Accumulated Depreciation | 0 |  |  |
Investment in Real Estate, Net | 1,543,343 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Other |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | N/A |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 0 |  |  |
Initial Cost to Company, Land | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 0 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 107,757 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 107,757 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 107,757 |  |  |
Accumulated Depreciation | (66,902) |  |  |
Investment in Real Estate, Net | 40,855 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Wholly Owned Unencumbered [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 64,363 |  |  |
Initial Cost to Company, Land | $ 4,875,308,605 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 16,033,230,297 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,620,022,325 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 4,875,308,605 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 17,653,252,622 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 22,528,561,227 |  |  |
Accumulated Depreciation | (6,521,859,521) |  |  |
Investment in Real Estate, Net | 16,006,701,706 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
1111 Belle Pre (fka The Madison) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Alexandria, VA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 360 |  |  |
Initial Cost to Company, Land | $ 18,937,702 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 94,758,679 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 517,009 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 18,937,702 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 95,275,688 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 114,213,390 |  |  |
Accumulated Depreciation | (28,767,103) |  |  |
Investment in Real Estate, Net | 85,446,287 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 86,236,221 |  |  |
2501 Porter [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 202 |  |  |
Initial Cost to Company, Land | $ 13,000,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 75,271,179 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 7,046,134 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 13,000,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 82,317,313 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 95,317,313 |  |  |
Accumulated Depreciation | (27,334,401) |  |  |
Investment in Real Estate, Net | $ 67,982,912 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | 0 |  |  |
300 East 39th (fka East 39th) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 254 |  |  |
Initial Cost to Company, Land | $ 48,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 96,174,639 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 5,841,752 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 48,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 102,016,391 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 150,916,391 |  |  |
Accumulated Depreciation | (32,773,924) |  |  |
Investment in Real Estate, Net | 118,142,467 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 62,517,552 |  |  |
303 East 83rd (fka Camargue) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 261 |  |  |
Initial Cost to Company, Land | $ 79,400,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 79,122,624 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 10,883,739 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 79,400,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 90,006,363 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 169,406,363 |  |  |
Accumulated Depreciation | (30,023,726) |  |  |
Investment in Real Estate, Net | $ 139,382,637 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | 0 |  |  |
425 Broadway [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Santa Monica, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 101 |  |  |
Initial Cost to Company, Land | $ 12,600,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 34,394,772 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 3,879,039 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 12,600,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 38,273,811 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 50,873,811 |  |  |
Accumulated Depreciation | (12,637,343) |  |  |
Investment in Real Estate, Net | $ 38,236,468 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | 0 |  |  |
Alcyone [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 162 |  |  |
Initial Cost to Company, Land | $ 11,379,497 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 49,360,503 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,621,195 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 11,379,497 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 50,981,698 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 62,361,195 |  |  |
Accumulated Depreciation | (13,657,401) |  |  |
Investment in Real Estate, Net | 48,703,794 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 26,717,175 |  |  |
Artisan Square [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Northridge, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 140 |  |  |
Initial Cost to Company, Land | $ 7,000,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 20,537,359 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,177,087 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 7,000,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 22,714,446 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 29,714,446 |  |  |
Accumulated Depreciation | (13,941,438) |  |  |
Investment in Real Estate, Net | 15,773,008 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 35,608,719 |  |  |
Avanti [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Anaheim, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 162 |  |  |
Initial Cost to Company, Land | $ 12,960,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 18,497,682 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,201,662 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 12,960,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 22,699,344 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 35,659,344 |  |  |
Accumulated Depreciation | (12,149,740) |  |  |
Investment in Real Estate, Net | 23,509,604 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 28,029,688 |  |  |
Avenir Apartments [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Boston, MA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 241 |  |  |
Initial Cost to Company, Land | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 114,321,619 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 6,957,817 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 121,279,436 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 121,279,436 |  |  |
Accumulated Depreciation | (36,961,367) |  |  |
Investment in Real Estate, Net | 84,318,069 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 83,594,553 |  |  |
Calvert Woodley [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 136 |  |  |
Initial Cost to Company, Land | $ 12,600,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 43,527,379 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,813,918 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 12,600,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 46,341,297 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 58,941,297 |  |  |
Accumulated Depreciation | (14,908,145) |  |  |
Investment in Real Estate, Net | $ 44,033,152 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | 0 |  |  |
Citrus Suites [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Santa Monica, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 70 |  |  |
Initial Cost to Company, Land | $ 9,000,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 16,950,326 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,159,124 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 9,000,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 19,109,450 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 28,109,450 |  |  |
Accumulated Depreciation | (6,341,008) |  |  |
Investment in Real Estate, Net | $ 21,768,442 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | 0 |  |  |
City Pointe [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Fullerton, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 183 |  |  |
Initial Cost to Company, Land | $ 6,863,792 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 36,476,208 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 3,982,736 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 6,863,792 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 40,458,944 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 47,322,736 |  |  |
Accumulated Depreciation | (16,998,993) |  |  |
Investment in Real Estate, Net | 30,323,743 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 39,604,834 |  |  |
Cleveland House [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 214 |  |  |
Initial Cost to Company, Land | $ 18,300,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 66,392,414 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 6,478,149 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 18,300,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 72,870,563 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 91,170,563 |  |  |
Accumulated Depreciation | (23,146,687) |  |  |
Investment in Real Estate, Net | $ 68,023,876 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | 0 |  |  |
Columbia Crossing [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 247 |  |  |
Initial Cost to Company, Land | $ 23,500,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 53,045,073 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 3,332,258 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 23,500,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 56,377,331 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 79,877,331 |  |  |
Accumulated Depreciation | (18,786,207) |  |  |
Investment in Real Estate, Net | $ 61,091,124 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | 0 |  |  |
Elevé [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Glendale, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 208 |  |  |
Initial Cost to Company, Land | $ 14,080,560 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 56,419,440 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,113,113 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 14,080,560 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 57,532,553 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 71,613,113 |  |  |
Accumulated Depreciation | (16,339,803) |  |  |
Investment in Real Estate, Net | 55,273,310 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 38,377,191 |  |  |
Estancia at Santa Clara (fka Santa Clara) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Santa Clara, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 450 |  |  |
Initial Cost to Company, Land | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 123,759,804 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,978,093 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 126,737,897 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 126,737,897 |  |  |
Accumulated Depreciation | (41,055,149) |  |  |
Investment in Real Estate, Net | $ 85,682,748 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | 0 |  |  |
Fairchase [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Fairfax, VA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 392 |  |  |
Initial Cost to Company, Land | $ 23,500,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 87,722,321 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,898,989 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 23,500,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 89,621,310 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 113,121,310 |  |  |
Accumulated Depreciation | (27,669,103) |  |  |
Investment in Real Estate, Net | $ 85,452,207 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | 0 |  |  |
Fairfield [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Stamford, CT |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 263 |  |  |
Initial Cost to Company, Land | $ 6,510,200 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 39,690,120 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 9,558,884 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 6,510,200 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 49,249,004 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 55,759,204 |  |  |
Accumulated Depreciation | (38,011,328) |  |  |
Investment in Real Estate, Net | 17,747,876 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 31,415,078 |  |  |
Flats at DuPont Circle [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Washington, D.C. |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 306 |  |  |
Initial Cost to Company, Land | $ 35,200,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 108,768,198 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,360,800 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 35,200,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 113,128,998 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 148,328,998 |  |  |
Accumulated Depreciation | (33,817,504) |  |  |
Investment in Real Estate, Net | $ 114,511,494 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | 0 |  |  |
Glo [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 201 |  |  |
Initial Cost to Company, Land | $ 16,047,023 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 48,650,963 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 3,698,250 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 16,047,023 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 52,349,213 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 68,396,236 |  |  |
Accumulated Depreciation | (19,833,118) |  |  |
Investment in Real Estate, Net | 48,563,118 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 32,536,206 |  |  |
Heights on Capitol Hill [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 104 |  |  |
Initial Cost to Company, Land | $ 5,425,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 21,138,028 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,918,209 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 5,425,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 23,056,237 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 28,481,237 |  |  |
Accumulated Depreciation | (11,613,731) |  |  |
Investment in Real Estate, Net | 16,867,506 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 22,574,473 |  |  |
Kelvin Court (fka Alta Pacific) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Irvine, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 132 |  |  |
Initial Cost to Company, Land | $ 10,752,145 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 34,846,856 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 960,195 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 10,752,145 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 35,807,051 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 46,559,196 |  |  |
Accumulated Depreciation | (15,665,700) |  |  |
Investment in Real Estate, Net | 30,893,496 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 26,250,120 |  |  |
Kenwood Mews [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Burbank, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 141 |  |  |
Initial Cost to Company, Land | $ 14,100,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 24,662,883 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,295,836 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 14,100,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 28,958,719 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 43,058,719 |  |  |
Accumulated Depreciation | (16,005,176) |  |  |
Investment in Real Estate, Net | 27,053,543 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 37,607,274 |  |  |
La Terrazza at Colma Station [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Colma, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 155 |  |  |
Initial Cost to Company, Land | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 41,251,044 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 3,595,476 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 44,846,520 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 44,846,520 |  |  |
Accumulated Depreciation | (21,415,715) |  |  |
Investment in Real Estate, Net | 23,430,805 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 25,018,990 |  |  |
Lindley Apartments [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Encino, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 129 |  |  |
Initial Cost to Company, Land | $ 5,805,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 25,705,000 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,226,777 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 5,805,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 27,931,777 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 33,736,777 |  |  |
Accumulated Depreciation | (11,253,531) |  |  |
Investment in Real Estate, Net | 22,483,246 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 28,028,542 |  |  |
Lofts 590 [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Arlington, VA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 212 |  |  |
Initial Cost to Company, Land | $ 20,100,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 67,909,023 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 948,447 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 20,100,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 68,857,470 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 88,957,470 |  |  |
Accumulated Depreciation | (20,702,192) |  |  |
Investment in Real Estate, Net | 68,255,278 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 42,977,538 |  |  |
Longview Place [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Waltham, MA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 348 |  |  |
Initial Cost to Company, Land | $ 20,880,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 90,255,509 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 11,851,439 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 20,880,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 102,106,948 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 122,986,948 |  |  |
Accumulated Depreciation | (53,169,019) |  |  |
Investment in Real Estate, Net | 69,817,929 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 84,236,459 |  |  |
Metro on First [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 102 |  |  |
Initial Cost to Company, Land | $ 8,540,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 12,209,981 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,503,132 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 8,540,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 14,713,113 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 23,253,113 |  |  |
Accumulated Depreciation | (7,824,496) |  |  |
Investment in Real Estate, Net | 15,428,617 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 21,479,983 |  |  |
Moda [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 251 |  |  |
Initial Cost to Company, Land | $ 12,649,228 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 36,842,012 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 2,077,059 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 12,649,228 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 38,919,071 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 51,568,299 |  |  |
Accumulated Depreciation | (16,192,358) |  |  |
Investment in Real Estate, Net | $ 35,375,941 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | 0 |  |  |
Montierra (CA) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | San Diego, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 272 |  |  |
Initial Cost to Company, Land | $ 8,160,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 29,360,938 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 8,739,937 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 8,160,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 38,100,875 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 46,260,875 |  |  |
Accumulated Depreciation | (27,667,597) |  |  |
Investment in Real Estate, Net | 18,593,278 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 60,994,469 |  |  |
Old Town Lofts [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Redmond, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 149 |  |  |
Initial Cost to Company, Land | $ 7,740,467 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 44,146,181 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 911,878 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 7,740,467 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 45,058,059 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 52,798,526 |  |  |
Accumulated Depreciation | (10,447,662) |  |  |
Investment in Real Estate, Net | 42,350,864 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 35,552,619 |  |  |
Olympus Towers [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 328 |  |  |
Initial Cost to Company, Land | $ 14,752,034 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 73,335,425 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 11,508,550 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 14,752,034 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 84,843,975 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 99,596,009 |  |  |
Accumulated Depreciation | (49,773,869) |  |  |
Investment in Real Estate, Net | 49,822,140 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 94,702,663 |  |  |
Park Place at San Mateo (fka San Mateo) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | San Mateo, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 575 |  |  |
Initial Cost to Company, Land | $ 71,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 211,907,141 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 14,964,633 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 71,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 226,871,774 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 298,771,774 |  |  |
Accumulated Depreciation | (72,984,554) |  |  |
Investment in Real Estate, Net | $ 225,787,220 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | 0 |  |  |
Skyhouse Denver [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Denver, CO |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 354 |  |  |
Initial Cost to Company, Land | $ 13,562,331 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 126,360,318 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 677,621 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 13,562,331 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 127,037,939 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 140,600,270 |  |  |
Accumulated Depreciation | (15,522,629) |  |  |
Investment in Real Estate, Net | 125,077,641 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 74,151,572 |  |  |
SoMa Square Apartments (fka South Market) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | San Francisco, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 410 |  |  |
Initial Cost to Company, Land | $ 79,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 177,316,977 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 16,836,498 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 79,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 194,153,475 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 274,053,475 |  |  |
Accumulated Depreciation | (60,659,528) |  |  |
Investment in Real Estate, Net | $ 213,393,947 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | 0 |  |  |
Square One [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 112 |  |  |
Initial Cost to Company, Land | $ 7,222,544 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 26,277,456 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 133,045 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 7,222,544 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 26,410,501 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 33,633,045 |  |  |
Accumulated Depreciation | (7,302,057) |  |  |
Investment in Real Estate, Net | $ 26,330,988 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | 0 |  |  |
Teresina [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Chula Vista, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 440 |  |  |
Initial Cost to Company, Land | $ 28,600,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 61,916,670 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 8,105,506 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 28,600,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 70,022,176 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 98,622,176 |  |  |
Accumulated Depreciation | (36,713,370) |  |  |
Investment in Real Estate, Net | 61,908,806 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 37,940,000 |  |  |
Vantage Hollywood [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 298 |  |  |
Initial Cost to Company, Land | $ 42,580,326 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 56,014,674 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 3,323,418 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 42,580,326 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 59,338,092 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 101,918,418 |  |  |
Accumulated Depreciation | (16,037,599) |  |  |
Investment in Real Estate, Net | 85,880,819 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 38,562,939 |  |  |
Vintage [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Ontario, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 300 |  |  |
Initial Cost to Company, Land | $ 7,059,230 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 47,677,762 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,982,739 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 7,059,230 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 49,660,501 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 56,719,731 |  |  |
Accumulated Depreciation | (25,190,161) |  |  |
Investment in Real Estate, Net | 31,529,570 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 49,111,234 |  |  |
Vintage at 425 Broadway (fka Promenade) [Memebr] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Santa Monica, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 60 |  |  |
Initial Cost to Company, Land | $ 9,000,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 13,961,523 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,968,533 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 9,000,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 15,930,056 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 24,930,056 |  |  |
Accumulated Depreciation | (5,447,549) |  |  |
Investment in Real Estate, Net | $ 19,482,507 |  |  |
Real Estate And Accumulated Depreciation, Encumbrances Reference | 0 |  |  |
West 54th [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | New York, NY |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 222 |  |  |
Initial Cost to Company, Land | $ 60,900,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 48,193,837 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,524,296 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 60,900,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 52,718,133 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 113,618,133 |  |  |
Accumulated Depreciation | (18,850,602) |  |  |
Investment in Real Estate, Net | 94,767,531 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 49,193,451 |  |  |
Westgate (fka Westgate I) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Pasadena, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 480 |  |  |
Initial Cost to Company, Land | $ 22,898,848 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 133,467,158 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,125,453 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 22,898,848 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 137,592,611 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 160,491,459 |  |  |
Accumulated Depreciation | (46,995,276) |  |  |
Investment in Real Estate, Net | 113,496,183 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 96,433,496 |  |  |
Portfolio/Entity Encumbrances [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 0 |  |  |
Initial Cost to Company, Land | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 0 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 0 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 0 |  |  |
Accumulated Depreciation | 0 |  |  |
Investment in Real Estate, Net | 0 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 798,691,865 |  |  |
Investment in Real Estate - Wholly Owned Encumbered [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 10,127 |  |  |
Initial Cost to Company, Land | $ 842,305,927 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 2,668,597,698 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 193,678,425 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 842,305,927 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 2,862,276,123 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 3,704,582,050 |  |  |
Accumulated Depreciation | (1,032,587,859) |  |  |
Investment in Real Estate, Net | 2,671,994,191 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 2,088,144,904 |  |  |
2300 Elliott [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 92 |  |  |
Initial Cost to Company, Land | $ 796,800 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 7,173,725 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 7,820,623 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 796,800 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 14,994,348 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 15,791,148 |  |  |
Accumulated Depreciation | (12,389,244) |  |  |
Investment in Real Estate, Net | 3,401,904 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
9th & W [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Washington, DC |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 0 |  |  |
Initial Cost to Company, Land | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 7,017,002 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 0 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 7,017,002 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 7,017,002 |  |  |
Accumulated Depreciation | 0 |  |  |
Investment in Real Estate, Net | 7,017,002 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Bellevue Meadows [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Bellevue, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 180 |  |  |
Initial Cost to Company, Land | $ 4,507,100 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 12,574,814 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 6,087,865 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 4,507,100 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 18,662,679 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 23,169,779 |  |  |
Accumulated Depreciation | (14,585,459) |  |  |
Investment in Real Estate, Net | 8,584,320 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Canyon Ridge [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | San Diego, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 162 |  |  |
Initial Cost to Company, Land | $ 4,869,448 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 11,955,063 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,258,637 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 4,869,448 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 16,213,700 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 21,083,148 |  |  |
Accumulated Depreciation | (12,460,975) |  |  |
Investment in Real Estate, Net | 8,622,173 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Country Oaks [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Agoura Hills, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 256 |  |  |
Initial Cost to Company, Land | $ 6,105,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 29,561,865 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 7,563,839 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 6,105,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 37,125,704 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 43,230,704 |  |  |
Accumulated Depreciation | (23,902,034) |  |  |
Investment in Real Estate, Net | 19,328,670 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Harrison Square (fka Elliot Bay) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Seattle, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 166 |  |  |
Initial Cost to Company, Land | $ 7,600,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 35,844,345 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 5,832,090 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 7,600,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 41,676,435 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 49,276,435 |  |  |
Accumulated Depreciation | (14,608,832) |  |  |
Investment in Real Estate, Net | 34,667,603 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Lantern Cove [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Foster City, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 232 |  |  |
Initial Cost to Company, Land | $ 6,945,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 23,064,976 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 7,999,330 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 6,945,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 31,064,306 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 38,009,306 |  |  |
Accumulated Depreciation | (21,090,571) |  |  |
Investment in Real Estate, Net | 16,918,735 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Radius Koreatown [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 301 |  |  |
Initial Cost to Company, Land | $ 32,494,154 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 84,645,202 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 394,749 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 32,494,154 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 85,039,951 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 117,534,105 |  |  |
Accumulated Depreciation | (15,147,227) |  |  |
Investment in Real Estate, Net | 102,386,878 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Rosecliff [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Quincy, MA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 156 |  |  |
Initial Cost to Company, Land | $ 5,460,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 15,721,570 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 4,712,510 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 5,460,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 20,434,080 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 25,894,080 |  |  |
Accumulated Depreciation | (14,750,661) |  |  |
Investment in Real Estate, Net | 11,143,419 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Schooner Bay I [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Foster City, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 168 |  |  |
Initial Cost to Company, Land | $ 5,345,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 20,390,618 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 7,030,910 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 5,345,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 27,421,528 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 32,766,528 |  |  |
Accumulated Depreciation | (18,045,457) |  |  |
Investment in Real Estate, Net | 14,721,071 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Schooner Bay II [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Foster City, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 144 |  |  |
Initial Cost to Company, Land | $ 4,550,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 18,064,764 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 5,732,766 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 4,550,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 23,797,530 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 28,347,530 |  |  |
Accumulated Depreciation | (16,050,917) |  |  |
Investment in Real Estate, Net | 12,296,613 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Surrey Downs [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Bellevue, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 122 |  |  |
Initial Cost to Company, Land | $ 3,057,100 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 7,848,618 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 3,698,582 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 3,057,100 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 11,547,200 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 14,604,300 |  |  |
Accumulated Depreciation | (8,809,623) |  |  |
Investment in Real Estate, Net | 5,794,677 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Venn at Main [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Bellevue, WA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 350 |  |  |
Initial Cost to Company, Land | $ 26,626,497 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 151,520,448 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 518,736 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 26,626,497 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 152,039,184 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 178,665,681 |  |  |
Accumulated Depreciation | (21,480,824) |  |  |
Investment in Real Estate, Net | 157,184,857 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Virgil Square [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Los Angeles, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 142 |  |  |
Initial Cost to Company, Land | $ 5,500,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 15,216,613 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 3,833,548 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 5,500,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 19,050,161 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 24,550,161 |  |  |
Accumulated Depreciation | (10,768,560) |  |  |
Investment in Real Estate, Net | 13,781,601 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Wood Creek II (fka Willow Brook (CA)) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Pleasant Hill, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 228 |  |  |
Initial Cost to Company, Land | $ 5,055,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 38,388,672 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 9,606,448 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 5,055,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 47,995,120 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 53,050,120 |  |  |
Accumulated Depreciation | (27,453,256) |  |  |
Investment in Real Estate, Net | 25,596,864 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Partially Owned Unencumbered [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 2,699 |  |  |
Initial Cost to Company, Land | $ 118,911,099 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 478,988,295 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 75,090,633 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 118,911,099 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 554,078,928 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 672,990,027 |  |  |
Accumulated Depreciation | (231,543,640) |  |  |
Investment in Real Estate, Net | 441,446,387 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 0 |  |  |
Aero Apartments [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Alameda, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 0 |  |  |
Initial Cost to Company, Land | $ 13,107,242 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 77,932,171 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 0 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 13,107,242 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 77,932,171 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 91,039,413 |  |  |
Accumulated Depreciation | 0 |  |  |
Investment in Real Estate, Net | 91,039,413 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 31,493,854 |  |  |
Canyon Creek (CA) [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | San Ramon, CA |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 268 |  |  |
Initial Cost to Company, Land | $ 5,425,000 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 18,812,120 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 8,138,492 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 5,425,000 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 26,950,612 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 32,375,612 |  |  |
Accumulated Depreciation | (19,317,572) |  |  |
Investment in Real Estate, Net | 13,058,040 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 28,193,080 |  |  |
Wisconsin Place [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Description Of Location | Chevy Chase, MD |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 432 |  |  |
Initial Cost to Company, Land | $ 0 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 172,089,355 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,687,416 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 0 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 173,776,771 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 173,776,771 |  |  |
Accumulated Depreciation | (54,348,611) |  |  |
Investment in Real Estate, Net | 119,428,160 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 146,057,885 |  |  |
Partially Owned Encumbered [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 700 |  |  |
Initial Cost to Company, Land | $ 18,532,242 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 268,833,646 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 9,825,908 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 18,532,242 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 278,659,554 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 297,191,796 |  |  |
Accumulated Depreciation | (73,666,183) |  |  |
Investment in Real Estate, Net | 223,525,613 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 205,744,819 |  |  |
Total Consolidated Investment in Real Estate [Member] |  |  |  |
Real Estate And Accumulated Depreciation Abstract |  |  |  |
Real Estate And Accumulated Depreciation Units | ApartmentUnit | 77,889 |  |  |
Initial Cost to Company, Land | $ 5,855,057,873 |  |  |
Real Estate and Accumulated Depreciation, Initial Cost of Buildings and Improvements | 19,449,649,936 |  |  |
Real Estate And Accumulated Depreciation Costs Capitalized Subsequent To Acquisition Building And Fixtures | 1,898,617,291 |  |  |
Gross Amount Carried at close of period 12/31/2020, Land | 5,855,057,873 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Buildings And Improvements And Furnitures And Fixtures | 21,348,267,227 |  |  |
Real Estate And Accumulated Depreciation Carrying Amount Of Land And Buildings And Improvements And Furnitures And Fixtures | 27,203,325,100 |  |  |
Accumulated Depreciation | (7,859,657,203) |  |  |
Investment in Real Estate, Net | 19,343,667,897 |  |  |
SEC Schedule III, Real Estate and Accumulated Depreciation, Amount of Encumbrances | $ 2,293,889,723 |  |  |

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