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Segment Disclosures - Summary of Reportable Segments (Detail) - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Revenues: |  |  |  |  |  |  |
Total revenues | $ 58,704,960 | $ 56,453,889 | $ 175,430,595 | $ 156,225,998 | $ 212,643,094 | $ 168,764,571 | $ 124,024,363
Operating expenses: |  |  |  |  |  |  |
General and administrative | 6,277,252 | 7,330,245 | 19,995,770 | 21,114,475 | 28,253,905 | 23,265,196 | 16,471,199
Depreciation | 13,427,138 | 13,220,916 | 40,075,331 | 36,155,008 | 49,417,679 | 40,946,406 | 32,294,627
Intangible amortization expense | 1,731,791 | 4,849,934 | 5,487,187 | 13,222,791 | 15,200,854 | 12,422,205 | 9,777,116
Acquisition expenses | 75,933 | 77,813 | 118,229 | 780,684 | 888,009 | 934,838 | 1,366,092
Contingent earnout adjustment | 0 | 200,626 | 0 | 1,514,447 | 1,514,447 | 12,619,744 | (2,500,000)
Write-off of equity interest and preexisting relationships in SST IV upon acquisition of control |  |  |  |  | 2,049,682 | 8,389,573 |
Impairment of goodwill and intangible assets |  |  |  |  |  |  | 36,465,732
Impairment of investments in Managed REITs |  |  |  |  | 0 | 0 | 4,376,879
Total operating expenses | 40,565,210 | 43,555,146 | 121,779,884 | 122,810,858 | 162,875,473 | 152,435,452 | 145,164,573
Write-off of equity interest and preexisting relationships upon acquisition of control | 0 | 0 | 0 | 2,049,682 | 2,049,682 | 8,389,573 | 0
Gain on sale of real estate |  |  |  | 16,101,237 | 0 | 178,631 | 0
Gain resulting from acquisition of unconsolidated affiliates |  |  |  |  | 16,101,237 |  |
Income (loss) from operations | 18,139,750 | 12,898,743 | 53,650,711 | 49,516,377 | 65,868,858 | 16,507,750 | (21,140,210)
Other income (expense): |  |  |  |  |  |  |
Interest expense | (15,925,440) | (11,752,656) | (45,533,886) | (28,181,026) | (41,511,911) | (33,383,604) | (36,053,312)
Net loss on extinguishment of debt | 0 | 0 | 0 | (2,393,475) | (2,393,475) | (2,444,788) | 0
Other, net | 432,645 | 1,729,957 | 2,376,138 | 1,444,061 | (848,805) | (2,055,351) | 160,461
Income tax benefit (expense) | 1,050,050 | (102,233) | 906,624 | 402,242 | 554,785 | 1,811,275 | 5,826,258
Equity in earnings (losses) from investments |  |  |  |  | (1,690,205) | (1,050,250) | 0
Net income (loss) | 2,978,726 | 2,246,524 | 9,290,680 | 19,529,105 | 21,669,452 | (19,564,718) | (51,206,803)
Self Storage |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |
Total revenues | 54,757,580 | 53,232,671 | 162,083,066 | 146,834,058 | 200,195,381 | 158,162,934 | 110,174,925
Operating expenses: |  |  |  |  |  |  |
Depreciation | 13,195,987 | 12,965,473 | 39,425,200 | 35,498,513 | 48,503,743 | 40,203,484 | 31,773,526
Intangible amortization expense | 1,682,861 | 4,801,004 | 5,340,396 | 12,799,016 | 14,728,148 | 11,134,100 | 5,234,312
Acquisition expenses | 75,933 | 77,813 | 118,229 | 780,684 | 888,009 | 934,838 | 1,366,092
Total operating expenses | 31,271,344 | 33,828,309 | 94,216,683 | 91,804,788 | 122,557,010 | 100,400,079 | 76,679,129
Gain on sale of real estate |  |  |  |  |  | 178,631 |
Income (loss) from operations | 23,486,236 | 19,404,362 | 67,866,383 | 55,029,270 | 77,638,371 | 57,941,486 | 33,495,796
Other income (expense): |  |  |  |  |  |  |
Interest expense | (15,883,077) | (11,709,293) | (45,407,435) | (28,051,635) | (41,339,401) | (33,207,310) | (35,864,227)
Net loss on extinguishment of debt |  |  |  | (2,393,475) | (2,393,475) | (2,444,788) |
Other, net | (94,186) | 645,520 | 126,923 | 394,535 | (209,578) | (173,245) | (783,189)
Income tax benefit (expense) | 1,162,745 | 70,245 | 705,693 | (13,131) | 36,197 | (193,604) | 2,491,215
Net income (loss) | 8,671,718 | 8,410,834 | 23,291,564 | 24,965,564 | 33,732,114 | 21,922,539 | (660,405)
Managed REIT Platform |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |
Total revenues | 3,947,380 | 3,221,218 | 13,347,529 | 9,391,940 | 12,447,713 | 10,601,637 | 13,849,438
Operating expenses: |  |  |  |  |  |  |
Intangible amortization expense | 48,930 | 48,930 | 146,791 | 423,775 | 472,706 | 1,288,105 | 4,542,804
Contingent earnout adjustment |  | 200,626 |  | 1,514,447 | 1,514,447 | 12,619,744 | (2,500,000)
Write-off of equity interest and preexisting relationships in SST IV upon acquisition of control |  |  |  |  | 2,049,682 | 8,389,573 |
Impairment of goodwill and intangible assets |  |  |  |  |  |  | 36,465,732
Impairment of investments in Managed REITs |  |  |  |  |  |  | 4,376,879
Total operating expenses | 2,785,463 | 2,141,149 | 6,917,300 | 9,235,100 | 11,150,622 | 28,027,255 | 51,493,144
Write-off of equity interest and preexisting relationships upon acquisition of control |  |  |  | 2,049,682 |  |  |
Gain on sale of real estate |  |  |  | 16,101,237 |  |  |
Gain resulting from acquisition of unconsolidated affiliates |  |  |  |  | 16,101,237 |  |
Income (loss) from operations | 1,161,917 | 1,080,069 | 6,430,229 | 16,258,077 | 17,398,328 | (17,425,618) | (37,643,706)
Other income (expense): |  |  |  |  |  |  |
Other, net | 696,786 | 444,287 | 2,535,800 | 569,387 | 155,332 | (602,403) | 1,222,086
Income tax benefit (expense) | (106,011) | (92,725) | (198,892) | 606,719 | 563,053 | 2,004,879 | 3,335,043
Net income (loss) | 1,308,649 | 1,091,467 | 7,873,344 | 16,786,635 | 18,116,713 | (16,023,142) | (33,086,577)
Corporate and Other |  |  |  |  |  |  |
Operating expenses: |  |  |  |  |  |  |
General and administrative |  |  |  |  | 28,253,905 | 23,265,196 | 16,471,199
Depreciation |  |  |  |  | 913,936 | 742,922 | 521,101
Total operating expenses |  |  |  |  | 29,167,841 | 24,008,118 | 16,992,300
Income (loss) from operations |  |  |  |  | (29,167,841) | (24,008,118) | (16,992,300)
Other income (expense): |  |  |  |  |  |  |
Interest expense |  |  |  |  | (172,510) | (176,294) | (189,085)
Other, net |  |  |  |  | (794,559) | (1,279,703) | (278,436)
Income tax benefit (expense) |  |  |  |  | (44,465) |  |
Equity in earnings (losses) from investments | (274,236) | (187,123) | (1,215,114) | (611,526) |  |  |
Net income (loss) |  |  |  |  | (30,179,375) | (25,464,115) | (17,459,821)
Corporate and other |  |  |  |  |  |  |
Operating expenses: |  |  |  |  |  |  |
General and administrative | 6,277,252 | 7,330,245 | 19,995,770 | 21,114,475 |  |  |
Depreciation | 231,151 | 255,443 | 650,131 | 656,495 |  |  |
Total operating expenses | 6,508,403 | 7,585,688 | 20,645,901 | 21,770,970 |  |  |
Income (loss) from operations | (6,508,403) | (7,585,688) | (20,645,901) | (21,770,970) |  |  |
Other income (expense): |  |  |  |  |  |  |
Interest expense | (42,363) | (43,363) | (126,451) | (129,391) |  |  |
Other, net | (1,699,955) | 640,150 | (286,585) | (480,139) |  |  |
Income tax benefit (expense) | (6,684) | (79,753) | 399,823 | (191,346) |  |  |
Net income (loss) | (7,001,641) | (7,255,777) | (21,874,228) | (22,223,094) |  |  |
Self Storage Rental Revenue |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |
Total revenues | 52,502,410 | 51,022,976 | 155,457,123 | 140,551,208 | 191,749,578 | 150,610,337 | 104,888,883
Self Storage Rental Revenue | Self Storage |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |
Total revenues | 52,502,410 | 51,022,976 | 155,457,123 | 140,551,208 | 191,749,578 | 150,610,337 | 104,888,883
Ancillary Operating Revenue |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |
Total revenues | 2,255,170 | 2,209,695 | 6,625,943 | 6,282,850 | 8,445,803 | 7,552,597 | 5,286,042
Ancillary Operating Revenue | Self Storage |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |
Total revenues | 2,255,170 | 2,209,695 | 6,625,943 | 6,282,850 | 8,445,803 | 7,552,597 | 5,286,042
Managed REIT Platform Revenue |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |
Total revenues | 2,517,853 | 2,055,224 | 9,115,093 | 5,877,454 | 7,819,216 | 6,322,970 | 8,048,630
Managed REIT Platform Revenue | Managed REIT Platform |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |
Total revenues | 2,517,853 | 2,055,224 | 9,115,093 | 5,877,454 | 7,819,216 | 6,322,970 | 8,048,630
Reimbursable Costs from Managed REITs |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |
Total revenues | 1,429,527 | 1,165,994 | 4,232,436 | 3,514,486 | 4,628,497 | 4,278,667 | 5,800,808
Operating expenses: |  |  |  |  |  |  |
Operating expenses | 1,429,527 | 1,165,994 | 4,232,436 | 3,514,486 | 4,628,497 | 4,278,667 | 5,800,808
Reimbursable Costs from Managed REITs | Managed REIT Platform |  |  |  |  |  |  |
Revenues: |  |  |  |  |  |  |
Total revenues | 1,429,527 | 1,165,994 | 4,232,436 | 3,514,486 | 4,628,497 | 4,278,667 | 5,800,808
Operating expenses: |  |  |  |  |  |  |
Operating expenses | 1,429,527 | 1,165,994 | 4,232,436 | 3,514,486 | 4,628,497 | 4,278,667 | 5,800,808
Property Operating Expenses |  |  |  |  |  |  |
Operating expenses: |  |  |  |  |  |  |
Operating expenses | 16,316,563 | 15,984,019 | 49,332,858 | 42,726,575 | 58,437,110 | 48,127,657 | 38,305,199
Property Operating Expenses | Self Storage |  |  |  |  |  |  |
Operating expenses: |  |  |  |  |  |  |
Operating expenses | 16,316,563 | 15,984,019 | 49,332,858 | 42,726,575 | 58,437,110 | 48,127,657 | 38,305,199
Managed REIT Platform Expenses |  |  |  |  |  |  |
Operating expenses: |  |  |  |  |  |  |
Operating expenses | 1,307,006 | 725,599 | 2,538,073 | 1,732,710 | 2,485,290 | 1,451,166 | 2,806,921
Managed REIT Platform Expenses | Managed REIT Platform |  |  |  |  |  |  |
Operating expenses: |  |  |  |  |  |  |
Operating expenses | 1,307,006 | 725,599 | 2,538,073 | 1,732,710 | $ 2,485,290 | $ 1,451,166 | $ 2,806,921
Managed REITS |  |  |  |  |  |  |
Other income (expense): |  |  |  |  |  |  |
Equity in earnings (losses) from investments | (444,043) | (340,164) | (893,793) | (647,548) |  |  |
Managed REITS | Managed REIT Platform |  |  |  |  |  |  |
Other income (expense): |  |  |  |  |  |  |
Equity in earnings (losses) from investments | (444,043) | (340,164) | (893,793) | (647,548) |  |  |
JV Properties |  |  |  |  |  |  |
Other income (expense): |  |  |  |  |  |  |
Equity in earnings (losses) from investments | (274,236) | (187,123) | (1,215,114) | (611,526) |  |  |
JV Properties | Corporate and other |  |  |  |  |  |  |
Other income (expense): |  |  |  |  |  |  |
Equity in earnings (losses) from investments | $ (274,236) | $ (187,123) | $ (1,215,114) | $ (611,526) |  |  |

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