Mortgage Revenue Bonds - Schedule of Investments in MRBs (Details) - USD ($)		Jun. 30, 2022		Dec. 31, 2021
Mortgage Revenue Bonds Held In Trust [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances		$ 661,410,839		$ 639,116,502
Cumulative Unrealized Gain		47,731,820		111,818,346
Cumulative Unrealized Loss		(366,754)
Estimated Fair Value		708,775,905		750,934,848
Mortgage Revenue Bonds Held In Trust [Member] | Courtyard [Member] | Series A [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[1]	9,923,002		9,970,209
Cumulative Unrealized Gain	[1]	706,295		2,060,480
Estimated Fair Value	[1]	10,629,297		12,030,689
Mortgage Revenue Bonds Held In Trust [Member] | Glenview Apartments [Member] | Series A [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[2]	4,401,268		4,429,350
Cumulative Unrealized Gain	[2]	389,603		863,955
Estimated Fair Value	[2]	4,790,871		5,293,305
Mortgage Revenue Bonds Held In Trust [Member] | Harmony Court Bakersfield [Member] | Series A [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[1]	3,618,064		3,635,277
Cumulative Unrealized Gain	[1]	231,895		720,308
Estimated Fair Value	[1]	3,849,959		4,355,585
Mortgage Revenue Bonds Held In Trust [Member] | Harmony Terrace [Member] | Series A [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[1]	6,698,296		6,730,004
Cumulative Unrealized Gain	[1]	501,771		1,425,757
Estimated Fair Value	[1]	7,200,067		8,155,761
Mortgage Revenue Bonds Held In Trust [Member] | Harden Ranch [Member] | Series A [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[3]	6,494,420		6,538,111
Cumulative Unrealized Gain	[3]	635,549		1,285,747
Estimated Fair Value	[3]	7,129,969		7,823,858
Mortgage Revenue Bonds Held In Trust [Member] | Las Palmas II [Member] | Series A [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[1]	1,641,483		1,649,370
Cumulative Unrealized Gain	[1]	110,762		332,704
Estimated Fair Value	[1]	1,752,245		1,982,074
Mortgage Revenue Bonds Held In Trust [Member] | Lutheran Gardens [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[4]	10,352,000
Cumulative Unrealized Gain	[4]	146,047
Estimated Fair Value	[4]	10,498,047
Mortgage Revenue Bonds Held In Trust [Member] | Montclair Apartments [Member] | Series A [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[2]	2,384,413		2,399,626
Cumulative Unrealized Gain	[2]	187,694		446,912
Estimated Fair Value	[2]	2,572,107		2,846,538
Mortgage Revenue Bonds Held In Trust [Member] | Montecito at Williams Ranch Apartments [Member] | Series A [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[4]	7,538,142		7,568,334
Cumulative Unrealized Gain	[4]	839,654		1,983,454
Estimated Fair Value	[4]	8,377,796		9,551,788
Mortgage Revenue Bonds Held In Trust [Member] | Montevista [Member] | Series A [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[4]	6,679,324		6,701,776
Cumulative Unrealized Gain	[4]	892,932		2,114,978
Estimated Fair Value	[4]	7,572,256		8,816,754
Mortgage Revenue Bonds Held In Trust [Member] | Ocotillo Springs [Member] | Series A [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[4]	15,000,000	[5]	15,000,000
Cumulative Unrealized Gain	[4]			271,172
Cumulative Unrealized Loss	[4],[5]	(338,121)
Estimated Fair Value	[4]	14,661,879	[5]	15,271,172
Mortgage Revenue Bonds Held In Trust [Member] | Residency at the Entrepreneur J -1 [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[4]	9,088,500
Cumulative Unrealized Gain	[4]	184,361
Estimated Fair Value	[4]	9,272,861
Mortgage Revenue Bonds Held In Trust [Member] | Residency at the Entrepreneur J -2 [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[4]	7,500,000
Cumulative Unrealized Gain	[4]	227,384
Estimated Fair Value	[4]	7,727,384
Mortgage Revenue Bonds Held In Trust [Member] | Residency at the Entrepreneur J -3 [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cumulative Unrealized Gain	[6]	704,506
Estimated Fair Value	[6]	704,506
Mortgage Revenue Bonds Held In Trust [Member] | Residency at the Mayer [Member] | Series A [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[4]	25,070,586		24,000,000
Estimated Fair Value	[4]	25,070,586		24,000,000
Mortgage Revenue Bonds Held In Trust [Member] | San Vicente [Member] | Series A [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[1]	3,384,651		3,400,913
Cumulative Unrealized Gain	[1]	240,298		671,681
Estimated Fair Value	[1]	3,624,949		4,072,594
Mortgage Revenue Bonds Held In Trust [Member] | Santa Fe Apartments [Member] | Series A [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[2]	2,888,627		2,907,057
Cumulative Unrealized Gain	[2]	262,829		567,028
Estimated Fair Value	[2]	3,151,456		3,474,085
Mortgage Revenue Bonds Held In Trust [Member] | Seasons at Simi Valley [Member] | Series A [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[1]	4,163,377		4,188,582
Cumulative Unrealized Gain	[1]	486,741		1,011,623
Estimated Fair Value	[1]	4,650,118		5,200,205
Mortgage Revenue Bonds Held In Trust [Member] | Seasons Lakewood [Member] | Series A [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[1]	7,135,142		7,168,917
Cumulative Unrealized Gain	[1]	534,496		1,518,742
Estimated Fair Value	[1]	7,669,638		8,687,659
Mortgage Revenue Bonds Held In Trust [Member] | Seasons San Juan Capistrano [Member] | Series A [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[1]	12,013,249		12,070,116
Cumulative Unrealized Gain	[1]	899,916		2,557,065
Estimated Fair Value	[1]	12,913,165		14,627,181
Mortgage Revenue Bonds Held In Trust [Member] | Summerhill [Member] | Series A [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[1]	6,230,249		6,259,888
Cumulative Unrealized Gain	[1]	333,756		1,187,464
Estimated Fair Value	[1]	6,564,005		7,447,352
Mortgage Revenue Bonds Held In Trust [Member] | Sycamore Walk [Member] | Series A [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[1]	3,452,100		3,474,617
Cumulative Unrealized Gain	[1]	237,708		696,090
Estimated Fair Value	[1]	3,689,808		4,170,707
Mortgage Revenue Bonds Held In Trust [Member] | The Village at Madera [Member] | Series A [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[1]	2,992,421		3,006,656
Cumulative Unrealized Gain	[1]	212,993		621,367
Estimated Fair Value	[1]	3,205,414		3,628,023
Mortgage Revenue Bonds Held In Trust [Member] | Tyler Park Townhomes [Member] | Series A [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[3]	5,655,665		5,694,168
Cumulative Unrealized Gain	[3]	339,434		691,137
Estimated Fair Value	[3]	5,995,099		6,385,305
Mortgage Revenue Bonds Held In Trust [Member] | Vineyard Gardens | Series A [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[4]	3,924,005		3,939,476
Cumulative Unrealized Gain	[4]	419,505		987,782
Estimated Fair Value	[4]	4,343,510		4,927,258
Mortgage Revenue Bonds Held In Trust [Member] | Westside Village Market [Member] | Series A [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[3]	3,695,968		3,721,129
Cumulative Unrealized Gain	[3]	326,300		701,915
Estimated Fair Value	[3]	4,022,268		4,423,044
Mortgage Revenue Bonds Held In Trust [Member] | Brookstone [Member] | IL [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[7]	7,311,136		7,334,161
Cumulative Unrealized Gain	[7]	1,437,974		1,903,086
Estimated Fair Value	[7]	8,749,110		9,237,247
Mortgage Revenue Bonds Held In Trust [Member] | Copper Gate Apartments [Member] | IN [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[3]	4,900,000		4,900,000
Cumulative Unrealized Gain	[3]	213,033		433,436
Estimated Fair Value	[3]	5,113,033		5,333,436
Mortgage Revenue Bonds Held In Trust [Member] | Renaissance [Member] | Series A [Member] | LA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[2]	10,659,934		10,732,295
Cumulative Unrealized Gain	[2]	1,298,461		4,172,381
Estimated Fair Value	[2]	11,958,395		14,904,676
Mortgage Revenue Bonds Held In Trust [Member] | Live 929 Apartments [Member] | Series 2022A [Member] | MD [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[4]	57,993,759
Cumulative Unrealized Gain	[4]	3,327,502
Estimated Fair Value	[4]	61,321,261
Mortgage Revenue Bonds Held In Trust [Member] | Live 929 Apartments [Member] | 2014 Series A [Member] | MD [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[4]			36,169,147
Cumulative Unrealized Gain	[4]			573,155
Estimated Fair Value	[4]			36,742,302
Mortgage Revenue Bonds Held In Trust [Member] | Jackson Manor Apartments [member] | MS [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[4]	6,900,000		4,900,000
Estimated Fair Value	[4]	6,900,000		4,900,000
Mortgage Revenue Bonds Held In Trust [Member] | Gateway Village [Member] | NC [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[4]			2,600,000
Cumulative Unrealized Gain	[4]			90,861
Estimated Fair Value	[4]			2,690,861
Mortgage Revenue Bonds Held In Trust [Member] | Greens Property [Member] | Series A [Member] | NC [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[3]	7,659,000		7,719,000
Cumulative Unrealized Gain	[3]	66,665		281,953
Estimated Fair Value	[3]	7,725,665		8,000,953
Mortgage Revenue Bonds Held In Trust [Member] | Lynnhaven Apartments [Member] | NC [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[4]			3,450,000
Cumulative Unrealized Gain	[4]			115,328
Estimated Fair Value	[4]			3,565,328
Mortgage Revenue Bonds Held In Trust [Member] | Silver Moon [Member] | Series A [Member] | NM [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[2]	7,594,049		7,629,704
Cumulative Unrealized Gain	[2]	846,853		1,868,323
Estimated Fair Value	[2]	8,440,902		9,498,027
Mortgage Revenue Bonds Held In Trust [Member] | Village at Avalon [Member] | NM [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[8]	16,006,888		16,069,382
Cumulative Unrealized Gain	[8]	1,591,273		4,124,498
Estimated Fair Value	[8]	17,598,161		20,193,880
Mortgage Revenue Bonds Held In Trust [Member] | Ohio Properties [Member] | Series A [Member] | OH [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[7]			13,580,000
Estimated Fair Value	[7]			13,580,000
Mortgage Revenue Bonds Held In Trust [Member] | Bridle Ridge [Member] | SC [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[7]			7,145,000
Estimated Fair Value	[7]			7,145,000
Mortgage Revenue Bonds Held In Trust [Member] | Columbia Gardens [Member] | SC [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[1]	12,635,293		12,725,440
Cumulative Unrealized Gain	[1]	774,457		2,003,599
Estimated Fair Value	[1]	13,409,750		14,729,039
Mortgage Revenue Bonds Held In Trust [Member] | Companion at Thornhill Apartments [Member] | SC [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[1]	10,856,396		10,924,609
Cumulative Unrealized Gain	[1]	777,399		1,793,226
Estimated Fair Value	[1]	11,633,795		12,717,835
Mortgage Revenue Bonds Held In Trust [Member] | Cross Creek [Member] | SC [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[7]	6,109,034		6,120,285
Cumulative Unrealized Gain	[7]	1,602,917		1,845,064
Estimated Fair Value	[7]	7,711,951		7,965,349
Mortgage Revenue Bonds Held In Trust [Member] | The Palms at Premier Park [Member] | SC [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[3]	18,263,243		18,385,572
Cumulative Unrealized Gain	[3]	1,046,818		2,181,632
Estimated Fair Value	[3]	19,310,061		20,567,204
Mortgage Revenue Bonds Held In Trust [Member] | Village at River's Edge [Member] | SC [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[1]	9,689,596		9,728,355
Cumulative Unrealized Gain	[1]	660,955		2,370,569
Estimated Fair Value	[1]	10,350,551		12,098,924
Mortgage Revenue Bonds Held In Trust [Member] | Willow Run [Member] | SC [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[1]	12,460,025		12,549,146
Cumulative Unrealized Gain	[1]	822,793		1,974,479
Estimated Fair Value	[1]	13,282,818		14,523,625
Mortgage Revenue Bonds Held In Trust [Member] | Arbors at Hickory Ridge [Member] | TN [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[3]	10,675,009		10,755,889
Cumulative Unrealized Gain	[3]	2,234,974		3,598,292
Estimated Fair Value	[3]	12,909,983		14,354,181
Mortgage Revenue Bonds Held In Trust [Member] | Avistar at Copperfield [Member] | Series A [Member] | TX [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[4]	13,606,505		13,678,286
Cumulative Unrealized Gain	[4]	937,879		2,549,711
Estimated Fair Value	[4]	14,544,384		16,227,997
Mortgage Revenue Bonds Held In Trust [Member] | Avistar at the Crest [Member] | Series A [Member] | TX [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[3]	8,960,216		9,022,172
Cumulative Unrealized Gain	[3]	823,134		1,926,825
Estimated Fair Value	[3]	9,783,350		10,948,997
Mortgage Revenue Bonds Held In Trust [Member] | Avistar at the Oaks [Member] | Series A [Member] | TX [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[3]	7,246,742		7,295,334
Cumulative Unrealized Gain	[3]	625,406		1,578,333
Estimated Fair Value	[3]	7,872,148		8,873,667
Mortgage Revenue Bonds Held In Trust [Member] | Avistar at the Parkway [Member] | Series A [Member] | TX [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[2]	12,505,935		12,579,783
Cumulative Unrealized Gain	[2]	1,039,589		2,353,247
Estimated Fair Value	[2]	13,545,524		14,933,030
Mortgage Revenue Bonds Held In Trust [Member] | Avistar at Wilcrest [Member] | Series A [Member] | TX [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[4]	5,156,590		5,183,794
Cumulative Unrealized Gain	[4]	179,313		772,242
Estimated Fair Value	[4]	5,335,903		5,956,036
Mortgage Revenue Bonds Held In Trust [Member] | Avistar at Wood Hollow [Member] | Series A [Member] | TX [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[4]	39,153,870		39,360,426
Cumulative Unrealized Gain	[4]	2,698,826		7,200,790
Estimated Fair Value	[4]	41,852,696		46,561,216
Mortgage Revenue Bonds Held In Trust [Member] | Avistar in 09 [Member] | Series A [Member] | TX [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[3]	6,257,280		6,299,237
Cumulative Unrealized Gain	[3]	498,613		1,288,060
Estimated Fair Value	[3]	6,755,893		7,587,297
Mortgage Revenue Bonds Held In Trust [Member] | Avistar on the Boulevard [Member] | Series A [Member] | TX [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[3]	15,264,695		15,370,243	[2]
Cumulative Unrealized Gain	[3]	1,256,157		3,165,575	[2]
Estimated Fair Value	[3]	16,520,852		18,535,818	[2]
Mortgage Revenue Bonds Held In Trust [Member] | Avistar on the Hills [Member] | Series A [Member] | TX [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[3]	4,961,282		4,994,549
Cumulative Unrealized Gain	[3]	444,670		1,100,478
Estimated Fair Value	[3]	5,405,952		6,095,027
Mortgage Revenue Bonds Held In Trust [Member] | Bruton Apartments [Member] | TX [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[1]	17,457,888		17,532,185
Cumulative Unrealized Gain	[1]	131,146		4,452,765
Estimated Fair Value	[1]	17,589,034		21,984,950
Mortgage Revenue Bonds Held In Trust [Member] | Concord at Gulfgate [Member] | Series A [Member] | TX [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[1]	18,507,340		18,606,719
Cumulative Unrealized Gain	[1]	1,729,783		4,211,979
Estimated Fair Value	[1]	20,237,123		22,818,698
Mortgage Revenue Bonds Held In Trust [Member] | Concord at Little York [Member] | Series A [Member] | TX [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[1]	12,965,267		13,034,887
Cumulative Unrealized Gain	[1]	1,298,582		3,055,517
Estimated Fair Value	[1]	14,263,849		16,090,404
Mortgage Revenue Bonds Held In Trust [Member] | Concord at Williamcrest [Member] | Series A [Member] | TX [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[1]	20,084,588		20,192,436
Cumulative Unrealized Gain	[1]	1,877,200		4,651,973
Estimated Fair Value	[1]	21,961,788		24,844,409
Mortgage Revenue Bonds Held In Trust [Member] | Crossing at 1415 [Member] | Series A [Member] | TX [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[1]	7,212,847		7,253,698
Cumulative Unrealized Gain	[1]	621,701		1,549,224
Estimated Fair Value	[1]	7,834,548		8,802,922
Mortgage Revenue Bonds Held In Trust [Member] | Decatur-Angle [Member] | TX [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[1]	21,972,150	[5]	22,074,594
Cumulative Unrealized Gain	[1]			4,731,759
Cumulative Unrealized Loss	[1],[5]	(28,633)
Estimated Fair Value	[1]	21,943,517	[5]	26,806,353
Mortgage Revenue Bonds Held In Trust [Member] | Esperanza at Palo Alto [Member] | TX [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[1]	18,994,977		19,071,622
Cumulative Unrealized Gain	[1]	2,004,725		5,317,911
Estimated Fair Value	[1]	20,999,702		24,389,533
Mortgage Revenue Bonds Held In Trust [Member] | Heights at 515 [Member] | Series A [Member] | TX [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[1]	6,603,486		6,640,885
Cumulative Unrealized Gain	[1]	569,178		1,418,341
Estimated Fair Value	[1]	7,172,664		8,059,226
Mortgage Revenue Bonds Held In Trust [Member] | Heritage Square [Member] | Series A [Member] | TX [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[2]	10,391,538		10,455,924
Cumulative Unrealized Gain	[2]	788,391		1,823,426
Estimated Fair Value	[2]	11,179,929		12,279,350
Mortgage Revenue Bonds Held In Trust [Member] | Oaks at Georgetown [Member] | Series A [Member] | TX [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[1]	11,969,564		12,026,225
Cumulative Unrealized Gain	[1]	642,792		2,181,690
Estimated Fair Value	[1]	12,612,356		14,207,915
Mortgage Revenue Bonds Held In Trust [Member] | Runnymede [Member] | TX [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[7]	9,605,000		9,675,000
Cumulative Unrealized Gain	[7]	64,079		99,489
Estimated Fair Value	[7]	9,669,079		9,774,489
Mortgage Revenue Bonds Held In Trust [Member] | Southpark [Member] | TX [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[7]	11,401,081		11,365,100
Cumulative Unrealized Gain	[7]	1,429,739		1,542,509
Estimated Fair Value	[7]	12,830,820		12,907,609
Mortgage Revenue Bonds Held In Trust [Member] | 15 West Apartments [Member] | WA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[1]	9,493,684		9,531,842
Cumulative Unrealized Gain	[1]	1,316,414		2,799,259
Estimated Fair Value	[1]	10,810,098		12,331,101
Mortgage Revenue Bonds [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances		20,170,561		41,395,781
Cumulative Unrealized Gain		434,436		1,179,215
Cumulative Unrealized Loss		(2,101,905)
Estimated Fair Value		18,503,092		42,574,996
Mortgage Revenue Bonds [Member] | Lutheran Gardens [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances				10,352,000
Estimated Fair Value				10,352,000
Mortgage Revenue Bonds [Member] | Live 929 Apartments [Member] | 2014 Series B [Member] | MD [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances				17,344,000
Estimated Fair Value				17,344,000
Mortgage Revenue Bonds [Member] | Gateway Village [Member] | NC [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances		2,596,424
Estimated Fair Value		2,596,424
Mortgage Revenue Bonds [Member] | Greens Property [Member] | Series B [Member] | NC [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances		917,922		920,637
Cumulative Unrealized Gain		12,540		46,672
Estimated Fair Value		930,462		967,309
Mortgage Revenue Bonds [Member] | Lynnhaven Apartments [Member] | NC [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances		3,445,255
Estimated Fair Value		3,445,255
Mortgage Revenue Bonds [Member] | Ohio Properties [Member] | Series B [Member] | OH [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances				3,465,270
Estimated Fair Value				3,465,270
Mortgage Revenue Bonds [Member] | Avistar at the Crest [Member] | Series B [Member] | TX [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances		727,745		730,612
Cumulative Unrealized Gain		40,497		122,646
Estimated Fair Value		768,242		853,258
Mortgage Revenue Bonds [Member] | Avistar at the Oaks [Member] | Series B [Member] | TX [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances		532,937		534,953
Cumulative Unrealized Gain		26,288		86,437
Estimated Fair Value		559,225		621,390
Mortgage Revenue Bonds [Member] | Avistar at the Parkway [Member] | Series B [Member] | TX [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances		123,394		123,598
Cumulative Unrealized Gain		23,981		37,590
Estimated Fair Value		147,375		161,188
Mortgage Revenue Bonds [Member] | Avistar in 09 [Member] | Series B [Member] | TX [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances		439,625		441,288
Cumulative Unrealized Gain		21,685		71,303
Estimated Fair Value		461,310		512,591
Mortgage Revenue Bonds [Member] | Avistar on the Boulevard [Member] | Series B [Member] | TX [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances		432,428		434,132
Cumulative Unrealized Gain		21,603		69,950
Estimated Fair Value		454,031		504,082
Mortgage Revenue Bonds [Member] | Solano Vista [Member] | Series A [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances		2,640,361		2,649,291
Cumulative Unrealized Gain		287,842		744,617
Estimated Fair Value		2,928,203		3,393,908
Mortgage Revenue Bonds [Member] | Provision Center 2014-1 [Member] | TN [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances		4,297,470		4,300,000
Estimated Fair Value		4,297,470		4,300,000
Mortgage Revenue Bonds [Member] | Meadow Valley [Member] | MI [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances		210,000	[9]	100,000
Cumulative Unrealized Loss	[9]	(2,011,812)
Estimated Fair Value		(1,801,812)	[9]	$ 100,000
Mortgage Revenue Bonds [Member] | CCBA Senior Garden Apartments [Member] | CA [Member]
Schedule Of Available For Sale Securities [Line Items]
Cost Adjusted for Paydowns and Allowances	[10]	3,807,000
Cumulative Unrealized Loss	[10]	(90,093)
Estimated Fair Value	[10]	$ 3,716,907

[1] MRBs owned by ATAX TEBS IV, LLC (M45 TEBS), Note 15

[2] MRBs owned by ATAX TEBS III, LLC (M33 TEBS), Note 15

[3] MRBs owned by ATAX TEBS II, LLC (M31 TEBS), Note 15

[4] MRBs held by Mizuho Capital Markets, LLC in a debt financing transaction, Note 15

[5] As of the date presented, the MRB had been in a cumulative unrealized loss position for less than 12 consecutive months and is not considered a credit loss. The Partnership determined the unrealized loss is a result of increasing market interest rates and is not considered other-than-temporary.

[6] The Partnership has an MRB funding commitment of $26.1 million as of June 30, 2022. The unfunded MRB commitment is accounted for as an available-for-sale security and reported at fair value. The reported unrealized grain is based on the fair value of the funding commitment outstanding as of June 30, 2022. The Partnership will partially fund the commitment with proceeds from a Mizuho Capital Markets, LLC debt financing transaction.

[7] MRBs owned by ATAX TEBS I, LLC (M24 TEBS), Note 15

[8] MRB held by Morgan Stanley in a debt financing transaction, Note 15

[9] The Partnership has a remaining MRB funding commitment of $43.9 million as of June 30, 2022. The MRB and the unfunded MRB commitment are accounted for as available-for-sale securities and reported at fair value. The reported unrealized loss includes the unrealized loss on the current MRB carrying value (based on current fair value) as well as the unrealized loss on the Partnership’s remaining $43.9 million funding commitment outstanding as of June 30, 2022 (also based on current fair value). The Partnership determined the unrealized loss is a result of increasing market interest rates and that the cumulative unrealized loss is not other-than-temporary.

[10] As of the date presented, the MRB had been in a cumulative unrealized loss position for less than 12 consecutive months and is not considered a credit loss. The Partnership determined the unrealized loss is a result of increasing market interest rates and is not considered other-than-temporary.