Condensed Consolidated Statements of Partners' Capital (Unaudited) - USD ($)	Total	Tier 2 [Member]	Tier 3 [Member]	General Partner [Member]	General Partner [Member] Tier 2 [Member]	BUCs - Restricted and Unrestricted [Member]	BUCs - Restricted and Unrestricted [Member] Tier 2 [Member]	BUCs - Restricted and Unrestricted [Member] Tier 3 [Member]	Number of BUCs - Restricted and Unrestricted [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2020	$ 359,772,042			$ 934,892		$ 358,837,150				$ 132,594,007
Partners' Capital Account, Units at Dec. 31, 2020									20,274,558
Distributions paid or accrued:
Regular distribution	(3,401,314)			(34,013)		(3,367,301)
Distribution of (income) loss (Note 3)		$ (2,809,106)			$ (702,277)		$ (2,106,829)
Net income (loss) allocable to Partners	6,275,091			736,936		5,538,155
Restricted unit compensation expense	78,114			781		77,333
Unrealized gain (loss) on securities	(16,298,797)			(162,988)		(16,135,809)				(16,298,797)
Unrealized loss on bond purchase commitments	(120,970)			(1,210)		(119,760)				(120,970)
Balance at Mar. 31, 2021	343,495,060			772,121		342,722,939				116,174,240
Partners' Capital Account, Units at Mar. 31, 2021									20,274,558
Balance at Dec. 31, 2020	359,772,042			934,892		358,837,150				132,594,007
Partners' Capital Account, Units at Dec. 31, 2020									20,274,558
Distributions paid or accrued:
Net income (loss) allocable to Partners	15,822,008
Unrealized loss on bond purchase commitments	(39,364)
Balance at Jun. 30, 2021	345,796,448			808,774		344,987,674				118,189,018
Partners' Capital Account, Units at Jun. 30, 2021									20,289,180
Balance at Mar. 31, 2021	343,495,060			772,121		342,722,939				116,174,240
Partners' Capital Account, Units at Mar. 31, 2021									20,274,558
Distributions paid or accrued:
Regular distribution	(2,624,057)			(26,241)		(2,597,816)
Distribution of (income) loss (Note 3)		(5,463,484)			(1,365,870)		(4,097,614)
Net income (loss) allocable to Partners	9,546,917			1,406,706		8,140,211
Repurchase of BUCs, Value	(1,363,736)					(1,363,736)
Repurchase of BUCs, Units									(74,153)
Restricted units awarded									88,775
Restricted unit compensation expense	190,970			1,910		189,060
Unrealized gain (loss) on securities	1,933,172			19,332		1,913,840				1,933,172
Unrealized loss on bond purchase commitments	81,606			816		80,790				81,606
Balance at Jun. 30, 2021	345,796,448			808,774		344,987,674				118,189,018
Partners' Capital Account, Units at Jun. 30, 2021									20,289,180
Balance at Dec. 31, 2021	372,412,027			765,550		371,646,477				114,040,260
Partners' Capital Account, Units at Dec. 31, 2021									22,094,159
Distributions paid or accrued:
Distribution of (income) loss (Note 3)		(9,721,430)			(2,430,358)		(7,291,072)
Net income (loss) allocable to Partners	25,546,274			2,737,044		22,809,230
Restricted unit compensation expense	173,898			1,739		172,159
Unrealized gain (loss) on securities	(47,751,656)			(477,517)		(47,274,139)				(47,751,656)
Unrealized loss on bond purchase commitments	(819,081)			(8,191)		(810,890)				(819,081)
Balance at Mar. 31, 2022	339,840,032			588,267		339,251,765				65,469,523
Partners' Capital Account, Units at Mar. 31, 2022									22,094,159
Balance at Dec. 31, 2021	372,412,027			765,550		371,646,477				114,040,260
Partners' Capital Account, Units at Dec. 31, 2021									22,094,159
Distributions paid or accrued:
Net income (loss) allocable to Partners	42,436,455
Unrealized loss on bond purchase commitments	(955,451)
Balance at Jun. 30, 2022	323,880,274			216,604		323,663,670				45,453,151
Partners' Capital Account, Units at Jun. 30, 2022									22,094,536
Balance at Mar. 31, 2022	339,840,032			588,267		339,251,765				65,469,523
Partners' Capital Account, Units at Mar. 31, 2022									22,094,159
Distributions paid or accrued:
Distribution of (income) loss (Note 3)		$ (1,620,764)	$ (11,378,312)		$ (405,190)		$ (1,215,574)	$ (11,378,312)
Net income (loss) allocable to Partners	16,890,181			232,036		16,658,145
Restricted units forfeited									(902)
Restricted unit compensation expense	165,509			1,655		163,854
Unrealized gain (loss) on securities	(19,880,002)			(198,800)		(19,681,202)				(19,880,002)
Unrealized loss on bond purchase commitments	(136,370)			(1,364)		(135,006)				(136,370)
Rounding of BUCs upon Reverse Unit Split									1,279
Balance at Jun. 30, 2022	$ 323,880,274			$ 216,604		$ 323,663,670				$ 45,453,151
Partners' Capital Account, Units at Jun. 30, 2022									22,094,536