Segments - Summary of Partnership Reportable Segment Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Total revenues
Total revenues	$ 55,528,568	$ 62,318,013
Interest expense
Interest expense	21,215,888	24,717,294
Depreciation expense
Depreciation expense	2,810,073	3,088,117
Net income (loss)
Net income (loss)	7,208,828	30,492,151
Total assets
Total assets	1,175,247,879	1,029,168,508
Operating Segments [Member] | Mortgage Revenue Bond Investments Segment [Member]
Total revenues
Total revenues	41,877,394	41,348,004
Interest expense
Interest expense	19,821,502	21,862,030
Depreciation expense
Depreciation expense	15,913
Net income (loss)
Net income (loss)	719,183	3,835,002
Total assets
Total assets	1,114,146,614	918,301,172
Operating Segments [Member] | MF Properties [Member]
Total revenues
Total revenues	6,986,009	8,081,029
Interest expense
Interest expense	1,196,393	1,444,700
Depreciation expense
Depreciation expense	2,794,160	3,088,117
Net income (loss)
Net income (loss)	(1,389,571)	(964,355)
Total assets
Total assets	67,988,190	70,569,646
Operating Segments [Member] | PHC Certificates [Member]
Total revenues
Total revenues	174,470	2,368,541
Interest expense
Interest expense	197,993	1,410,564
Net income (loss)
Net income (loss)	1,390,999	957,977
Total assets
Total assets		43,591,048
Operating Segments [Member] | Other Investments [Member]
Total revenues
Total revenues	6,490,695	10,520,439
Net income (loss)
Net income (loss)	6,488,217	26,663,527
Total assets
Total assets	106,931,182	87,098,315
Consolidation, Eliminations [Member]
Total assets
Total assets	$ (113,818,107)	$ (90,391,673)