Segments - Summary of Partnership Reportable Segment Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Total revenues
Total revenues	$ 19,206,371	$ 14,387,488
Interest expense
Interest expense	3,937,131	5,226,475
Depreciation expense
Depreciation expense	683,662	683,460
Net income (loss)
Net income (loss)	26,264,018	6,992,854
Total assets
Total assets	1,395,902,288		$ 1,385,909,483
Operating Segments [Member] | Affordable Multifamily MRB Investments [Member]
Total revenues
Total revenues	14,133,406	10,794,788
Interest expense
Interest expense	3,472,044	4,944,277
Depreciation expense
Depreciation expense	5,962	5,811
Net income (loss)
Net income (loss)	6,965,555	2,549,452
Total assets
Total assets	1,320,010,193		1,304,626,248
Operating Segments [Member] | Seniors and Skilled Nursing MRB Investments [Member]
Total revenues
Total revenues	229,378
Net income (loss)
Net income (loss)	228,753
Total assets
Total assets	12,761,007		13,533,020
Operating Segments [Member] | Market-Rate Joint Venture Investments [Member]
Total revenues
Total revenues	2,916,586	1,898,176
Interest expense
Interest expense	192,324
Net income (loss)
Net income (loss)	19,162,043	4,706,221
Total assets
Total assets	111,842,744		112,052,513
Operating Segments [Member] | MF Properties [Member]
Total revenues
Total revenues	1,927,001	1,694,524
Interest expense
Interest expense	272,763	282,198
Depreciation expense
Depreciation expense	677,700	677,649
Net income (loss)
Net income (loss)	(92,333)	$ (262,819)
Total assets
Total assets	61,702,566		66,501,994
Consolidation, Eliminations [Member]
Total assets
Total assets	$ (110,414,222)		$ (110,804,292)