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Mortgage Revenue Bonds - Description of Certain Terms of Partnership's MRBs (Details) - USD ($)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Summary Of Investment Holdings [Line Items]    
Principal Outstanding $ 771,014,252 $ 697,713,691
15 West Apartments [Member] | Series A [Member] | Vancouver Washington [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [1] 2016 2016
Maturity Date [1] Jul. 01, 2054 Jul. 01, 2054
Base Interest Rate [1] 6.25% 6.25%
Principal Outstanding [1] $ 9,454,318 $ 9,531,842
Arbors at Hickory Ridge [Member] | Memphis, Tennessee [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [2] 2012 2012
Maturity Date [2] Jan. 01, 2049 Jan. 01, 2049
Base Interest Rate [2] 6.25% 6.25%
Principal Outstanding [2] $ 10,545,462 $ 10,701,537
Avistar at Copperfield [Member] | Series A [Member] | Houston, TX [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired 2017 [3] 2017 [4]
Maturity Date May 01, 2054 [3] May 01, 2054 [4]
Base Interest Rate 5.75% [3] 5.75% [4]
Principal Outstanding $ 13,532,636 [3] $ 13,678,286 [4]
Avistar on the Boulevard [Member] | Series A [Member] | San Antonio, TX [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [2] 2013 2013
Maturity Date [2] Mar. 01, 2050 Mar. 01, 2050
Base Interest Rate [2] 6.00% 6.00%
Principal Outstanding [2] $ 15,155,942 $ 15,370,243
Avistar at the Crest [Member] | Series A [Member] | San Antonio, TX [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [2] 2013 2013
Maturity Date [2] Mar. 01, 2050 Mar. 01, 2050
Base Interest Rate [2] 6.00% 6.00%
Principal Outstanding [2] $ 8,896,378 $ 9,022,172
Avistar (February 2013 Acquisition) [Member] | Series B [Member] | San Antonio, TX [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired 2013 2013
Maturity Date Apr. 01, 2050 Apr. 01, 2050
Base Interest Rate 9.00% 9.00%
Principal Outstanding $ 1,155,394 $ 1,164,744
Avistar at the Oaks [Member] | Series A [Member] | San Antonio, TX [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [2] 2013 2013
Maturity Date [2] Aug. 01, 2050 Aug. 01, 2050
Base Interest Rate [2] 6.00% 6.00%
Principal Outstanding [2] $ 7,196,674 $ 7,295,334
Avistar in 09 [Member] | Series A [Member] | San Antonio, TX [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [2] 2013 2013
Maturity Date [2] Aug. 01, 2050 Aug. 01, 2050
Base Interest Rate [2] 6.00% 6.00%
Principal Outstanding [2] $ 6,214,048 $ 6,299,237
Avistar on the Hills [Member] | Series A [Member] | San Antonio, TX [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [2] 2013 2013
Maturity Date [2] Aug. 01, 2050 Aug. 01, 2050
Base Interest Rate [2] 6.00% 6.00%
Principal Outstanding [2] $ 4,927,003 $ 4,994,549
Avistar (June 2013 Acquisition) [Member] | Series B [Member] | San Antonio, TX [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired 2013 2013
Maturity Date Sep. 01, 2050 Sep. 01, 2050
Base Interest Rate 9.00% 9.00%
Principal Outstanding $ 968,715 $ 976,241
Avistar at the Parkway [Member] | Series A [Member] | San Antonio, TX [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [5] 2015 2015
Maturity Date [5] May 01, 2052 May 01, 2052
Base Interest Rate [5] 6.00% 6.00%
Principal Outstanding [5] $ 12,429,842 $ 12,579,783
Avistar at the Parkway [Member] | Series B [Member] | San Antonio, TX [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired 2015 2015
Maturity Date Jun. 01, 2052 Jun. 01, 2052
Base Interest Rate 12.00% 12.00%
Principal Outstanding $ 123,176 $ 123,598
Avistar at Wilcrest [Member] | Series A [Member] | Houston, TX [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired 2017 [6] 2017 [4]
Maturity Date May 01, 2054 [6] May 01, 2054 [4]
Base Interest Rate 5.75% [6] 5.75% [4]
Principal Outstanding $ 5,128,595 [6] $ 5,183,794 [4]
Avistar at Wood Hollow [Member] | Series A [Member] | Austin,TX [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired 2017 [6] 2017 [4]
Maturity Date May 01, 2054 [6] May 01, 2054 [4]
Base Interest Rate 5.75% [6] 5.75% [4]
Principal Outstanding $ 38,941,304 [6] $ 39,360,427 [4]
Bridle Ridge [Member] | Greer, SC [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [7]   2008
Maturity Date [7]   Jan. 01, 2043
Base Interest Rate [7]   6.00%
Principal Outstanding [7]   $ 7,145,000
Brookstone [Member] | Waukegan, Illinois [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [7] 2009 2009
Maturity Date [7] May 01, 2040 May 01, 2040
Base Interest Rate [7] 5.45% 5.45%
Principal Outstanding [7] $ 8,403,386 $ 8,531,517
Bruton Apartments [Member] | Dallas Texas [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [1] 2014 2014
Maturity Date [1] Aug. 01, 2054 Aug. 01, 2054
Base Interest Rate [1] 6.00% 6.00%
Principal Outstanding [1] $ 17,381,296 $ 17,532,185
CCBA Senior Garden Apartments [Member] | San Diego, CA [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired 2022  
Maturity Date Jul. 01, 2037  
Base Interest Rate 4.50%  
Principal Outstanding $ 3,792,700  
Columbia Gardens [Member] | Columbia South Carolina    
Summary Of Investment Holdings [Line Items]    
Year Acquired [1] 2015 2015
Maturity Date [1] Dec. 01, 2050 Dec. 01, 2050
Base Interest Rate [1] 5.50% 5.50%
Principal Outstanding [1] $ 12,455,000 $ 12,620,000
Companion at Thornhill Apartments [Member] | Lexington, South Carolina [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [1] 2016 2016
Maturity Date [1] Jan. 01, 2052 Jan. 01, 2052
Base Interest Rate [1] 5.80% 5.80%
Principal Outstanding [1] $ 10,786,181 $ 10,924,609
Concord at Gulfgate [Member] | Series A [Member] | Houston, TX [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [1] 2015 2015
Maturity Date [1] Feb. 01, 2032 Feb. 01, 2032
Base Interest Rate [1] 6.00% 6.00%
Principal Outstanding [1] $ 18,404,942 $ 18,606,719
Concord at Little York [Member] | Series A [Member] | Houston, TX [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [1] 2015 2015
Maturity Date [1] Feb. 01, 2032 Feb. 01, 2032
Base Interest Rate [1] 6.00% 6.00%
Principal Outstanding [1] $ 12,893,533 $ 13,034,887
Concord at Williamcrest [Member] | Series A [Member] | Houston, TX [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [1] 2015 2015
Maturity Date [1] Feb. 01, 2032 Feb. 01, 2032
Base Interest Rate [1] 6.00% 6.00%
Principal Outstanding [1] $ 19,973,464 $ 20,192,436
Courtyard [Member] | Series A [Member] | Fullerton California [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [1] 2016 2016
Maturity Date [1] Dec. 01, 2033 Dec. 01, 2033
Base Interest Rate [1] 5.00% 5.00%
Principal Outstanding [1] $ 9,874,603 $ 9,970,209
Cross Creek [Member] | Beaufort, South Carolina [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [7]   2009
Maturity Date [7]   Mar. 01, 2049
Base Interest Rate [7]   6.15%
Principal Outstanding [7]   $ 7,747,521
Decatur Angle [Member] | Fort Worth, Texas [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [1] 2014 2014
Maturity Date [1] Jan. 01, 2054 Jan. 01, 2054
Base Interest Rate [1] 5.75% 5.75%
Principal Outstanding [1] $ 21,866,672 $ 22,074,594
Harden Ranch [Member] | Series A [Member] | Salinas California    
Summary Of Investment Holdings [Line Items]    
Year Acquired [2] 2014 2014
Maturity Date [2] Mar. 01, 2030 Mar. 01, 2030
Base Interest Rate [2] 5.75% 5.75%
Principal Outstanding [2] $ 6,449,455 $ 6,538,111
Heritage Square [Member] | Series A [Member] | Edinburg Texas    
Summary Of Investment Holdings [Line Items]    
Year Acquired [5] 2014 2014
Maturity Date [5] Sep. 01, 2051 Sep. 01, 2051
Base Interest Rate [5] 6.00% 6.00%
Principal Outstanding [5] $ 10,325,196 $ 10,455,924
Jackson Manor Apartments [Member] | Jackson, MS [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired 2021 [6] 2021 [4]
Maturity Date May 01, 2038 [6] May 01, 2038 [4]
Base Interest Rate 5.00% [6] 5.00% [4]
Principal Outstanding $ 6,900,000 [6] $ 4,900,000 [4]
Crossing at 1415 [Member] | Series A [Member] | San Antonio, TX [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [1] 2015 2015
Maturity Date [1] Dec. 01, 2052 Dec. 01, 2052
Base Interest Rate [1] 6.00% 6.00%
Principal Outstanding [1] $ 7,170,756 $ 7,253,698
Gateway Village [Member] | Durham, North Carolina [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [4]   2019
Maturity Date [4]   Apr. 01, 2032
Base Interest Rate [4]   6.10%
Principal Outstanding [4]   $ 2,600,000
Esperanza at Palo Alto [Member] | San Antonio, TX [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [1] 2018 2018
Maturity Date [1] Jul. 01, 2058 Jul. 01, 2058
Base Interest Rate [1] 5.80% 5.80%
Principal Outstanding [1] $ 18,916,082 $ 19,071,622
Glenview Apartments [Member] | Series A [Member] | Cameron California [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [5] 2014 2014
Maturity Date [5] Dec. 01, 2031 Dec. 01, 2031
Base Interest Rate [5] 5.75% 5.75%
Principal Outstanding [5] $ 4,372,370 $ 4,429,350
Greens Property [Member] | Series A [Member] | Durham, North Carolina [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [2] 2012 2012
Maturity Date [2] Oct. 01, 2047 Oct. 01, 2047
Base Interest Rate [2] 6.50% 6.50%
Principal Outstanding [2] $ 7,599,000 $ 7,719,000
Greens Property [Member] | Series B [Member] | Durham, North Carolina [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired 2012 2012
Maturity Date Oct. 01, 2047 Oct. 01, 2047
Base Interest Rate 12.00% 12.00%
Principal Outstanding $ 915,039 $ 920,637
Harmony Court Bakersfield [Member] | Series A [Member] | Bakersfield, California [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [1] 2016 2016
Maturity Date [1] Dec. 01, 2033 Dec. 01, 2033
Base Interest Rate [1] 5.00% 5.00%
Principal Outstanding [1] $ 3,600,418 $ 3,635,277
Heights at 515 [Member] | Series A [Member] | San Antonio, TX [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [1] 2015 2015
Maturity Date [1] Dec. 01, 2052 Dec. 01, 2052
Base Interest Rate [1] 6.00% 6.00%
Principal Outstanding [1] $ 6,564,951 $ 6,640,885
Harmony Terrace [Member] | Series A [Member] | Simi Valley, California [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [1] 2016 2016
Maturity Date [1] Jan. 01, 2034 Jan. 01, 2034
Base Interest Rate [1] 5.00% 5.00%
Principal Outstanding [1] $ 6,665,787 $ 6,730,004
Las Palmas II [Member] | Series A [Member] | Coachella, California [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [1] 2016 2016
Maturity Date [1] Nov. 01, 2033 Nov. 01, 2033
Base Interest Rate [1] 5.00% 5.00%
Principal Outstanding [1] $ 1,633,397 $ 1,649,370
Live 929 Apartments [Member] | Series A [Member] | Baltimore Maryland    
Summary Of Investment Holdings [Line Items]    
Year Acquired 2022 [6] 2014 [4]
Maturity Date Jan. 01, 2060 [6] Jul. 01, 2049 [4]
Base Interest Rate 4.30% [6] 5.78% [4]
Principal Outstanding $ 66,365,000 [6] $ 39,465,000 [4]
Live 929 Apartments [Member] | Series B [Member] | Baltimore Maryland    
Summary Of Investment Holdings [Line Items]    
Year Acquired   2021
Maturity Date   Jul. 01, 2039
Base Interest Rate   1.60%
Principal Outstanding   $ 21,680,000
Lutheran Gardens [Member] | Compton, CA [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired   2021
Maturity Date   Feb. 01, 2025
Base Interest Rate   4.90%
Principal Outstanding   $ 10,352,000
Lutheran Gardens [Member] | Series A [Member] | Compton, CA [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [6] 2021  
Maturity Date [6] Feb. 01, 2025  
Base Interest Rate [6] 4.90%  
Principal Outstanding [6] $ 10,352,000  
Lynnhaven Apartments [Member] | Durham, North Carolina [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [4]   2019
Maturity Date [4]   Apr. 01, 2032
Base Interest Rate [4]   6.10%
Principal Outstanding [4]   $ 3,450,000
Meadow Valley [Member] | Garfield Charter Township, MI [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired   2021
Maturity Date   Dec. 01, 2029
Base Interest Rate   6.25%
Principal Outstanding   $ 100,000
Meadow Valley [Member] | Series A [Member] | Garfield Charter Township, MI [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired 2021  
Maturity Date Dec. 01, 2029  
Base Interest Rate 6.25%  
Principal Outstanding $ 4,723,437  
Montclair Apartments [Member] | Series A [Member] | Lemoore California    
Summary Of Investment Holdings [Line Items]    
Year Acquired 2014 2014 [5]
Maturity Date Dec. 01, 2031 Dec. 01, 2031 [5]
Base Interest Rate 5.75% 5.75% [5]
Principal Outstanding $ 2,368,757 $ 2,399,626 [5]
Montecito at Williams Ranch Apartments [Member] | Series A [Member] | Salinas California    
Summary Of Investment Holdings [Line Items]    
Year Acquired 2017 [6] 2017 [4]
Maturity Date Oct. 01, 2034 [6] Oct. 01, 2034 [4]
Base Interest Rate 5.50% [6] 5.50% [4]
Principal Outstanding $ 7,507,111 [6] $ 7,568,334 [4]
Montevista [Member] | Series A [Member] | San Pablo, CA [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired 2019 [6] 2019 [4]
Maturity Date Jul. 01, 2036 [6] Jul. 01, 2036 [4]
Base Interest Rate 5.75% [6] 5.75% [4]
Principal Outstanding $ 6,656,219 [6] $ 6,701,776 [4]
Oaks at Georgetown [Member] | Series A [Member] | Georgetown, Texas [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [1] 2016 2016
Maturity Date [1] Jan. 01, 2034 Jan. 01, 2034
Base Interest Rate [1] 5.00% 5.00%
Principal Outstanding [1] $ 11,911,472 $ 12,026,225
Ocotillo Springs [Member] | Series A [Member] | Brawley, CA [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired 2020 [6] 2020 [4]
Maturity Date Aug. 01, 2037 [6] Aug. 01, 2037 [4]
Base Interest Rate 4.55% [6] 4.55% [4]
Principal Outstanding $ 11,090,000 [6] $ 15,000,000 [4]
Ohio Properties [Member] | Series A [Member] | OH [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [7]   2010
Maturity Date [7]   Jun. 01, 2050
Base Interest Rate [7]   7.00%
Principal Outstanding [7]   $ 13,580,000
Ohio Properties [Member] | Series B [Member] | OH [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired   2010
Maturity Date   Jun. 01, 2050
Base Interest Rate   10.00%
Principal Outstanding   $ 3,465,270
Park at Sondrio - Series 2022A | Greenville, SC [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [6] 2022  
Maturity Date [6] Jan. 01, 2030  
Base Interest Rate [6] 6.50%  
Principal Outstanding [6] $ 38,100,000  
Park at Vietti - Series 2022A | Spartanburg, SC [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [6] 2022  
Maturity Date [6] Jan. 01, 2030  
Base Interest Rate [6] 6.50%  
Principal Outstanding [6] $ 26,985,000  
Provision Center 2014-1 [Member] | Knoxville Tennessee    
Summary Of Investment Holdings [Line Items]    
Year Acquired 2014 2014
Maturity Date May 01, 2034 May 01, 2034
Base Interest Rate 6.00% 6.00%
Principal Outstanding $ 10,000,000 $ 10,000,000
Renaissance [Member] | Series A [Member] | Baton Rouge, Louisiana [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [5] 2015 2015
Maturity Date [5] Jun. 01, 2050 Jun. 01, 2050
Base Interest Rate [5] 6.00% 6.00%
Principal Outstanding [5] $ 10,585,375 $ 10,732,295
Residency at Empire - Series BB-1 [Member] | Burbank, California [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired 2022  
Maturity Date Dec. 01, 2040  
Base Interest Rate 6.45%  
Principal Outstanding $ 14,000,000  
Residency at Empire - Series BB-2 [Member] | Burbank, California [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired 2022  
Maturity Date Dec. 01, 2040  
Base Interest Rate 6.45%  
Principal Outstanding $ 4,000,000  
Residency at Empire - Series BB-3 [Member] | Burbank, California [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired 2022  
Maturity Date Dec. 01, 2040  
Base Interest Rate 6.45%  
Principal Outstanding $ 55,000  
Residency at the Mayer [Member] | Series A [Member] | Hollywood, CA [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [6] 2021  
Maturity Date [6] Apr. 01, 2039  
Base Interest Rate [6] 3.85%  
Principal Outstanding [6] $ 26,000,000  
Rosewood Townhomes [Member] | Series A [Member] | Goose Creek South Carolina    
Summary Of Investment Holdings [Line Items]    
Year Acquired [4]   2021
Maturity Date [4]   Apr. 01, 2039
Base Interest Rate [4]   3.85%
Principal Outstanding [4]   $ 24,000,000
Residency at the Entrepreneur J -1 [Member] | Los Angeles, CA [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [6] 2022  
Maturity Date [6] Mar. 31, 2040  
Base Interest Rate [6] 6.00%  
Principal Outstanding [6] $ 9,000,000  
Residency at the Entrepreneur J -2 [Member] | Los Angeles, CA [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [6] 2022  
Maturity Date [6] Mar. 31, 2040  
Base Interest Rate [6] 6.00%  
Principal Outstanding [6] $ 7,500,000  
Residency at the Entrepreneur J -3 [Member] | Los Angeles, CA [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [6] 2022  
Maturity Date [6] Mar. 31, 2040  
Base Interest Rate [6] 6.00%  
Principal Outstanding [6] $ 3,900,000  
Runnymede [Member] | Austin,TX [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [7] 2007 2007
Maturity Date [7] Oct. 01, 2042 Oct. 01, 2042
Base Interest Rate [7] 6.00% 6.00%
Principal Outstanding [7] $ 9,535,000 $ 9,675,000
San Vicente [Member] | Series A [Member] | Soledad, California [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [1] 2016 2016
Maturity Date [1] Nov. 01, 2033 Nov. 01, 2033
Base Interest Rate [1] 5.00% 5.00%
Principal Outstanding [1] $ 3,367,978 $ 3,400,913
Santa Fe Apartments [Member] | Series A [Member] | Hesperia California    
Summary Of Investment Holdings [Line Items]    
Year Acquired [5] 2014 2014
Maturity Date [5] Dec. 01, 2031 Dec. 01, 2031
Base Interest Rate [5] 5.75% 5.75%
Principal Outstanding [5] $ 2,869,660 $ 2,907,057
Seasons at Simi Valley [Member] | Series A [Member] | Simi Valley, California [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [1] 2015 2015
Maturity Date [1] Sep. 01, 2032 Sep. 01, 2032
Base Interest Rate [1] 5.75% 5.75%
Principal Outstanding [1] $ 4,137,438 $ 4,188,582
Seasons Lakewood [Member] | Series A [Member] | Lakewood, California [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [1] 2016 2016
Maturity Date [1] Jan. 01, 2034 Jan. 01, 2034
Base Interest Rate [1] 5.00% 5.00%
Principal Outstanding [1] $ 7,100,512 $ 7,168,917
Seasons San Juan Capistrano [Member] | Series A [Member] | San Juan Capistrano California    
Summary Of Investment Holdings [Line Items]    
Year Acquired [1] 2016 2016
Maturity Date [1] Jan. 01, 2034 Jan. 01, 2034
Base Interest Rate [1] 5.00% 5.00%
Principal Outstanding [1] $ 11,954,944 $ 12,070,116
Silver Moon [Member] | Series A [Member] | Albuquerque, NM [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [5] 2015 2015
Maturity Date [5] Aug. 01, 2055 Aug. 01, 2055
Base Interest Rate [5] 6.00% 6.00%
Principal Outstanding [5] $ 7,557,312 $ 7,629,704
Solano Vista [Member] | Series A [Member] | Vallejo, CA [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired 2018 2018
Maturity Date Jan. 01, 2036 Jan. 01, 2036
Base Interest Rate 5.85% 5.85%
Principal Outstanding $ 2,631,168 $ 2,649,291
Southpark [Member] | Austin,TX [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [7] 2009 2009
Maturity Date [7] Dec. 01, 2049 Dec. 01, 2049
Base Interest Rate [7] 6.13% 6.13%
Principal Outstanding [7] $ 12,495,000 $ 12,675,000
Summerhill [Member] | Series A [Member] | Bakersfield, California [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [1] 2016 2016
Maturity Date [1] Dec. 01, 2033 Dec. 01, 2033
Base Interest Rate [1] 5.00% 5.00%
Principal Outstanding [1] $ 6,199,861 $ 6,259,888
Sycamore Walk [Member] | Series A [Member] | Bakersfield, California [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [1] 2015 2015
Maturity Date [1] Jan. 01, 2033 Jan. 01, 2033
Base Interest Rate [1] 5.25% 5.25%
Principal Outstanding [1] $ 3,428,986 $ 3,474,617
The Palms at Premier Park Apartments | Columbia South Carolina    
Summary Of Investment Holdings [Line Items]    
Year Acquired [2] 2013 2013
Maturity Date [2] Jan. 01, 2050 Jan. 01, 2050
Base Interest Rate [2] 6.25% 6.25%
Principal Outstanding [2] $ 18,137,042 $ 18,385,572
Tyler Park Townhomes [Member] | Greenfield California    
Summary Of Investment Holdings [Line Items]    
Year Acquired [2] 2013 2013
Maturity Date [2] Jan. 01, 2030 Jan. 01, 2030
Base Interest Rate [2] 5.75% 5.75%
Principal Outstanding [2] $ 5,616,043 $ 5,694,168
Village at Avalon [Member] | Albuquerque, NM [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired 2018 [8] 2018 [9]
Maturity Date Jan. 01, 2059 [8] Jan. 01, 2059 [9]
Base Interest Rate 5.80% [8] 5.80% [9]
Principal Outstanding $ 15,942,559 [8] $ 16,069,382 [9]
The Village at Madera [Member] | Series A [Member] | Madera, California [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired [1] 2016 2016
Maturity Date [1] Dec. 01, 2033 Dec. 01, 2033
Base Interest Rate [1] 5.00% 5.00%
Principal Outstanding [1] $ 2,977,825 $ 3,006,656
Village at River's Edge [Member] | Columbia South Carolina    
Summary Of Investment Holdings [Line Items]    
Year Acquired [1] 2017 2017
Maturity Date [1] Jun. 01, 2033 Jun. 01, 2033
Base Interest Rate [1] 6.00% 6.00%
Principal Outstanding [1] $ 9,649,659 $ 9,728,355
Vineyard Gardens | Series A [Member] | Oxnard, CA [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired 2017 [6] 2017 [4]
Maturity Date Jan. 01, 2035 [6] Jan. 01, 2035 [4]
Base Interest Rate 5.50% [6] 5.50% [4]
Principal Outstanding $ 3,908,104 [6] $ 3,939,476 [4]
Westside Village Market [Member] | Shafter California    
Summary Of Investment Holdings [Line Items]    
Year Acquired [2] 2013 2013
Maturity Date [2] Jan. 01, 2030 Jan. 01, 2030
Base Interest Rate [2] 5.75% 5.75%
Principal Outstanding [2] $ 3,670,075 $ 3,721,129
Willow Run [Member] | Columbia South Carolina    
Summary Of Investment Holdings [Line Items]    
Year Acquired [1] 2015 2015
Maturity Date [1] Dec. 01, 2050 Dec. 01, 2050
Base Interest Rate [1] 5.50% 5.50%
Principal Outstanding [1] $ 12,282,000 $ 12,444,000
Copper Gate Apartments [Member] | Lafayette, Indiana [Member]    
Summary Of Investment Holdings [Line Items]    
Year Acquired 2013 [2] 2013 [1]
Maturity Date Dec. 01, 2029 [2] Dec. 01, 2029 [1]
Base Interest Rate 6.25% [2] 6.25% [1]
Principal Outstanding $ 4,840,000 [2] $ 4,900,000 [1]
[1] MRB owned by ATAX TEBS IV, LLC (M45 TEBS), Note 15. The TEBS financing has contractual limitations on the Partnership’s ability to sell the MRB.
[2] MRB owned by ATAX TEBS II, LLC (M31 TEBS), Note 15. The TEBS financing has contractual limitations on the Partnership’s ability to sell the MRB.
[3] MRB held by Mizuho Capital Markets, LLC in a debt financing transaction, Note 15
[4] MRB held by Mizuho Capital Markets, LLC in a debt financing transaction, Note 15
[5] MRB owned by ATAX TEBS III, LLC (M33 TEBS), Note 15. The TEBS financing has contractual limitations on the Partnership’s ability to sell the MRB.
[6] MRB held by Mizuho Capital Markets, LLC in a secured financing transaction, Note 15
[7] MRB owned by ATAX TEBS I, LLC (M24 TEBS), Note 15. The TEBS financing has contractual limitations on the Partnership’s ability to sell the MRB.
[8] MRB held by Morgan Stanley in a secured financing transaction, Note 15
[9] MRB held by Morgan Stanley in a debt financing transaction, Note 15