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REAL ESTATE INVESTMENTS - Schedule of Real Estate Properties (Details) - USD ($) | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | $ 396,680,878 |  |
Tenant origination and absorption costs | 27,266,610 | $ 17,717,819 |
Accumulated Depreciation and Amortization | (20,411,794) | (10,563,664) | $ (3,574,739)
Total investments in real estate property, net | 403,535,694 | $ 224,648,345 |
Office | Accredo Health |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 9,855,847 |  |
Tenant origination and absorption costs | 1,053,637 |  |
Accumulated Depreciation and Amortization | (1,754,846) |  |
Total investments in real estate property, net | 9,154,638 |  |
Office | Northrop Grumman |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 12,382,991 |  |
Tenant origination and absorption costs | 1,341,199 |  |
Accumulated Depreciation and Amortization | (2,185,956) |  |
Total investments in real estate property, net | 11,538,234 |  |
Office | exp US Services |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 6,056,668 |  |
Tenant origination and absorption costs | 388,248 |  |
Accumulated Depreciation and Amortization | (609,311) |  |
Total investments in real estate property, net | 5,835,605 |  |
Office | Wyndham |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 10,406,483 |  |
Tenant origination and absorption costs | 669,232 |  |
Accumulated Depreciation and Amortization | (815,730) |  |
Total investments in real estate property, net | 10,259,985 |  |
Office | Williams Sonoma |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 8,079,612 |  |
Tenant origination and absorption costs | 550,486 |  |
Accumulated Depreciation and Amortization | (746,900) |  |
Total investments in real estate property, net | 7,883,198 |  |
Office | EMCOR |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 5,960,610 |  |
Tenant origination and absorption costs | 463,488 |  |
Accumulated Depreciation and Amortization | (424,764) |  |
Total investments in real estate property, net | 5,999,334 |  |
Office | Cummins |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 14,465,491 |  |
Tenant origination and absorption costs | 1,536,998 |  |
Accumulated Depreciation and Amortization | (1,357,376) |  |
Total investments in real estate property, net | 14,645,113 |  |
Office | Texas Health |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 6,976,703 |  |
Tenant origination and absorption costs | 713,221 |  |
Accumulated Depreciation and Amortization | (384,029) |  |
Total investments in real estate property, net | 7,305,895 |  |
Office | Bon Secours |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 10,042,551 |  |
Tenant origination and absorption costs | 800,356 |  |
Accumulated Depreciation and Amortization | (526,238) |  |
Total investments in real estate property, net | 10,316,669 |  |
Office | PMI Preclinical |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 9,672,174 |  |
Tenant origination and absorption costs | 408,225 |  |
Accumulated Depreciation and Amortization | 0 |  |
Total investments in real estate property, net | 10,080,399 |  |
Office | GSA (MSHA) |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 3,112,076 |  |
Tenant origination and absorption costs | 243,307 |  |
Accumulated Depreciation and Amortization | 0 |  |
Total investments in real estate property, net | 3,355,383 |  |
Office | Solar Turbines |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 7,133,241 |  |
Tenant origination and absorption costs | 284,026 |  |
Accumulated Depreciation and Amortization | 0 |  |
Total investments in real estate property, net | 7,417,267 |  |
Office | Wood Group |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 9,731,220 |  |
Tenant origination and absorption costs | 392,955 |  |
Accumulated Depreciation and Amortization | 0 |  |
Total investments in real estate property, net | 10,124,175 |  |
Office | Gap |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 8,378,276 |  |
Tenant origination and absorption costs | 360,377 |  |
Accumulated Depreciation and Amortization | 0 |  |
Total investments in real estate property, net | 8,738,653 |  |
Office | L-3 Communications |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 11,631,857 |  |
Tenant origination and absorption costs | 454,035 |  |
Accumulated Depreciation and Amortization | 0 |  |
Total investments in real estate property, net | 12,085,892 |  |
Office | Sutter Health |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 29,555,055 |  |
Tenant origination and absorption costs | 1,616,610 |  |
Accumulated Depreciation and Amortization | 0 |  |
Total investments in real estate property, net | 31,171,665 |  |
Retail | Walgreens, Stockbridge, GA |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 4,147,948 |  |
Tenant origination and absorption costs | 705,423 |  |
Accumulated Depreciation and Amortization | (1,175,073) |  |
Total investments in real estate property, net | 3,678,298 |  |
Retail | Dollar General, Litchfield |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 1,281,812 |  |
Tenant origination and absorption costs | 116,302 |  |
Accumulated Depreciation and Amortization | (125,762) |  |
Total investments in real estate property, net | 1,272,352 |  |
Retail | Dollar General, Wilton |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 1,543,776 |  |
Tenant origination and absorption costs | 140,653 |  |
Accumulated Depreciation and Amortization | (160,948) |  |
Total investments in real estate property, net | 1,523,481 |  |
Retail | Dollar General, Thompsontown |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 1,199,860 |  |
Tenant origination and absorption costs | 106,730 |  |
Accumulated Depreciation and Amortization | (120,834) |  |
Total investments in real estate property, net | 1,185,756 |  |
Retail | Dollar General, Mt. Gilead |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 1,174,188 |  |
Tenant origination and absorption costs | 111,847 |  |
Accumulated Depreciation and Amortization | (115,853) |  |
Total investments in real estate property, net | 1,170,182 |  |
Retail | Dollar General, Lakeside |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 1,112,872 |  |
Tenant origination and absorption costs | 100,857 |  |
Accumulated Depreciation and Amortization | (118,901) |  |
Total investments in real estate property, net | 1,094,828 |  |
Retail | Dollar General, Castalia |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 1,102,086 |  |
Tenant origination and absorption costs | 86,408 |  |
Accumulated Depreciation and Amortization | (115,524) |  |
Total investments in real estate property, net | 1,072,970 |  |
Retail | Harley |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 13,178,288 |  |
Tenant origination and absorption costs | 0 |  |
Accumulated Depreciation and Amortization | (907,230) |  |
Total investments in real estate property, net | 12,271,058 |  |
Retail | 24 Hour Fitness |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 11,484,784 |  |
Tenant origination and absorption costs | 1,204,973 |  |
Accumulated Depreciation and Amortization | (653,647) |  |
Total investments in real estate property, net | 12,036,110 |  |
Retail | Costco |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 27,292,418 |  |
Tenant origination and absorption costs | 2,765,136 |  |
Accumulated Depreciation and Amortization | (1,352,612) |  |
Total investments in real estate property, net | 28,704,942 |  |
Retail | Chevron Gas Station, San Jose |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 4,054,759 |  |
Tenant origination and absorption costs | 145,577 |  |
Accumulated Depreciation and Amortization | 0 |  |
Total investments in real estate property, net | 4,200,336 |  |
Retail | Chevron Gas Station, Roseville |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 3,648,571 |  |
Tenant origination and absorption costs | 136,415 |  |
Accumulated Depreciation and Amortization | 0 |  |
Total investments in real estate property, net | 3,784,986 |  |
Retail | Island Pacific Supermarket |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 2,560,311 |  |
Tenant origination and absorption costs | 197,495 |  |
Accumulated Depreciation and Amortization | 0 |  |
Total investments in real estate property, net | 2,757,806 |  |
Retail | Dollar General |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 4,899,714 |  |
Tenant origination and absorption costs | 261,630 |  |
Accumulated Depreciation and Amortization | 0 |  |
Total investments in real estate property, net | 5,161,344 |  |
Retail | Rite Aid |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 6,842,089 |  |
Tenant origination and absorption costs | 420,441 |  |
Accumulated Depreciation and Amortization | 0 |  |
Total investments in real estate property, net | 7,262,530 |  |
Retail | EcoThrift |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 5,550,226 |  |
Tenant origination and absorption costs | 273,846 |  |
Accumulated Depreciation and Amortization | 0 |  |
Total investments in real estate property, net | 5,824,072 |  |
Retail | PreK Education |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 12,447,287 |  |
Tenant origination and absorption costs | 447,927 |  |
Accumulated Depreciation and Amortization | 0 |  |
Total investments in real estate property, net | 12,895,214 |  |
Retail | Dollar Tree |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 1,320,367 |  |
Tenant origination and absorption costs | 73,298 |  |
Accumulated Depreciation and Amortization | 0 |  |
Total investments in real estate property, net | 1,393,665 |  |
Retail | Dollar General Big Spring |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 1,281,683 |  |
Tenant origination and absorption costs | 76,351 |  |
Accumulated Depreciation and Amortization | 0 |  |
Total investments in real estate property, net | 1,358,034 |  |
Retail | Walgreens, Santa Maria |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 5,223,442 |  |
Tenant origination and absorption costs | 335,945 |  |
Accumulated Depreciation and Amortization | 0 |  |
Total investments in real estate property, net | 5,559,387 |  |
Industrial | Dana |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 8,392,906 |  |
Tenant origination and absorption costs | 1,210,874 |  |
Accumulated Depreciation and Amortization | (1,492,171) |  |
Total investments in real estate property, net | 8,111,609 |  |
Industrial | Omnicare |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 7,262,747 |  |
Tenant origination and absorption costs | 281,442 |  |
Accumulated Depreciation and Amortization | (587,875) |  |
Total investments in real estate property, net | 6,956,314 |  |
Industrial | Husqvarna |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 11,840,200 |  |
Tenant origination and absorption costs | 1,013,948 |  |
Accumulated Depreciation and Amortization | (756,557) |  |
Total investments in real estate property, net | 12,097,591 |  |
Industrial | AvAir |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 27,357,900 |  |
Tenant origination and absorption costs | 0 |  |
Accumulated Depreciation and Amortization | (1,417,062) |  |
Total investments in real estate property, net | 25,940,838 |  |
Industrial | 3M |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 14,762,819 |  |
Tenant origination and absorption costs | 2,356,361 |  |
Accumulated Depreciation and Amortization | (2,231,246) |  |
Total investments in real estate property, net | 14,887,934 |  |
Industrial | Taylor Fresh Foods |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 34,194,370 |  |
Tenant origination and absorption costs | 2,894,017 |  |
Accumulated Depreciation and Amortization | (275,349) |  |
Total investments in real estate property, net | 36,813,038 |  |
Industrial | Levins |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 4,429,390 |  |
Tenant origination and absorption costs | 221,927 |  |
Accumulated Depreciation and Amortization | 0 |  |
Total investments in real estate property, net | 4,651,317 |  |
Industrial | Dinan Cars |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 6,252,657 |  |
Tenant origination and absorption costs | 0 |  |
Accumulated Depreciation and Amortization | 0 |  |
Total investments in real estate property, net | 6,252,657 |  |
Industrial | ITW Rippey |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 7,071,143 |  |
Tenant origination and absorption costs | 304,387 |  |
Accumulated Depreciation and Amortization | 0 |  |
Total investments in real estate property, net | 7,375,530 |  |
Land | Northrop Grumman |  |  |
Real Estate [Line Items] |  |  |
Land, Buildings and Improvements | 329,410 |  |
Tenant origination and absorption costs | 0 |  |
Accumulated Depreciation and Amortization | 0 |  |
Total investments in real estate property, net | $ 329,410 |  |

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