Fair Value of Financial Instruments - Summary of Activity Related to Level 3 Assets and Liabilities (Details) - Fair Value, Inputs, Level 3 [Member] - USD ($)		3 Months Ended				6 Months Ended
		Jun. 30, 2022		Jun. 30, 2021		Jun. 30, 2022		Jun. 30, 2021
Schedule of Available-for-sale Securities [Line Items]
Assets at Fair Value, beginning balance		$ 745,034,841		$ 773,607,185		$ 798,246,109		$ 796,696,304
Total gains (losses) (realized/unrealized) [Abstract]
Total gain (losses) included in earnings (interest income and interest expense)		1,417,910		1,803,456		3,406,948		3,644,154
Total gain (losses) Included in earnings (provision for credit loss)				(900,080)				(900,080)
Total gain (losses) included in other comprehensive income		(20,016,372)		2,014,779		(68,587,109)		(14,404,988)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		22,630,000		6,880,000		98,320,000		8,951,500
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		(9,922,893)		(3,238,495)		(91,381,929)		(13,820,045)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Other	[1]					(860,533)
Assets at Fair Value, ending balance		739,143,486		780,166,845		739,143,486		780,166,845
Total amount of gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets or liabilities held		5,086		(909,574)		144,749		(902,123)
Interest Rate Derivative Financial Instruments [Member]
Schedule of Available-for-sale Securities [Line Items]
Assets at Fair Value, beginning balance		397,658
Derivative Assets (Liabilities) at Fair Value, beginning balance				327,376		343,418		321,503
Total gains (losses) (realized/unrealized) [Abstract]
Total gain (losses) included in earnings (interest income and interest expense)		1,324,000		1,769,026		3,198,738		3,575,193
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements		(1,323,378)		(1,775,030)		(3,143,876)		(3,575,324)
Derivative Assets (Liabilities) at Fair Value, ending balance		398,280		321,372		398,280		321,372
Total amount of gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets or liabilities held		(12,258)		(9,494)		122,126		(2,043)
Bond Purchase Commitment [Member]
Schedule of Available-for-sale Securities [Line Items]
Assets at Fair Value, beginning balance		145,323		310,909		964,404		431,879
Total gains (losses) (realized/unrealized) [Abstract]
Total gain (losses) included in other comprehensive income		(136,370)		81,606		(955,451)		(39,364)
Assets at Fair Value, ending balance		8,953		392,515		8,953		392,515
Taxable Mortgage Revenue Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Assets at Fair Value, beginning balance		9,535,962		1,443,988		3,428,443		1,510,437
Total gains (losses) (realized/unrealized) [Abstract]
Total gain (losses) included in earnings (interest income and interest expense)		(10,072)				(10,072)
Total gain (losses) included in other comprehensive income		(116,770)		21,266		(331,693)		(42,846)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		2,050,750				8,375,750
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		(2,614)		(2,392)		(5,172)		(4,729)
Assets at Fair Value, ending balance		11,457,256		1,462,862		11,457,256		1,462,862
Mortgage Revenue Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Assets at Fair Value, beginning balance		734,955,898	[2]	771,524,912	[3]	793,509,844	[4]	794,432,485	[5]
Total gains (losses) (realized/unrealized) [Abstract]
Total gain (losses) included in earnings (interest income and interest expense)		103,982	[2]	34,430	[3]	218,282	[4]	68,961	[5]
Total gain (losses) Included in earnings (provision for credit loss)				(900,080)	[3]			(900,080)	[5]
Total gain (losses) included in other comprehensive income		(19,763,232)	[2]	1,911,907	[3]	(67,299,965)	[4]	(14,322,778)	[5]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases		20,579,250	[2]	6,880,000	[3]	89,944,250	[4]	8,951,500	[5]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements		(8,596,901)	[2]	(1,461,073)	[3]	(88,232,881)	[4]	(10,239,992)	[5]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Other	[1],[4]					(860,533)
Assets at Fair Value, ending balance		727,278,997	[2]	777,990,096	[3]	727,278,997	[2]	777,990,096	[3]
Total amount of gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets or liabilities held		$ 17,344	[2]	$ (900,080)	[3]	$ 22,623	[4]	$ (900,080)	[5]

[1] The other line is related to a re-allocation of the loan loss allowance upon restructuring of the Live 929 Apartments MRBs and property loan (Notes 6 and 10).

[2] Mortgage revenue bonds includes both bonds held in trust as well as those held by the Partnership.

[3] Mortgage revenue bonds includes both bonds held in trust as well as those held by the Partnership.

[4] Mortgage revenue bonds includes both bonds held in trust as well as those held by the Partnership.

[5] Mortgage revenue bonds includes both bonds held in trust as well as those held by the Partnership.