SCHEDULE IV MORTGAGE LOANS RECEIVABLE (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Carrying Amount of Mortgage	$ 114,182
Accrued interest	8,629
Allowance for estimated losses	(1,825)
Notes and interest receivable	$ 120,986	$ 83,541	$ 70,166	$ 81,133
Mortgage Loans [Member] | Prospectus Endeavors 4, LLC [Member]
Interest Rate	12.00%
Final Maturity Date	2023-01
Periodic Payment Terms	Excess cash flow
Face Amount of Mortgage	$ 5,907
Carrying Amount of Mortgage	$ 5,907
Mortgage Loans [Member] | Prospectus Endeavors 6, LLC [Member]
Interest Rate	12.00%
Final Maturity Date	2022-10
Periodic Payment Terms	Excess cash flow
Face Amount of Mortgage	$ 496
Carrying Amount of Mortgage	$ 496
Mortgage Loans [Member] | Oulan-Chikh Family Trust [Member]
Interest Rate	8.00%
Final Maturity Date	2021-03
Periodic Payment Terms	Excess cash flow
Face Amount of Mortgage	$ 174
Carrying Amount of Mortgage	$ 174
Mortgage Loans [Member] | H198, LLC McKinney Ranch Land [Member]
Interest Rate	6.00%
Final Maturity Date	2020-09
Periodic Payment Terms	Excess cash flow
Face Amount of Mortgage	$ 4,554
Carrying Amount of Mortgage	$ 4,554
Mortgage Loans [Member] | Forest Pines [Member]
Interest Rate	5.00%
Final Maturity Date	2020-11
Periodic Payment Terms	Excess cash flow
Carrying Amount of Mortgage	$ 2,868
Mortgage Loans [Member] | Spyglass Apartments of Ennis, LP [Member]
Interest Rate	5.00%
Final Maturity Date	2020-11
Periodic Payment Terms	Excess cash flow
Face Amount of Mortgage	$ 5,083
Carrying Amount of Mortgage	$ 5,288
Mortgage Loans [Member] | Bellwether Ridge [Member]
Interest Rate	5.00%
Final Maturity Date	2020-05
Periodic Payment Terms	Excess cash flow
Face Amount of Mortgage	$ 3,429
Carrying Amount of Mortgage	$ 3,765
Mortgage Loans [Member] | Parc at Windmill Farms [Member]
Interest Rate	5.00%
Final Maturity Date	2020-05
Periodic Payment Terms	Excess cash flow
Face Amount of Mortgage	$ 6,066
Carrying Amount of Mortgage	$ 7,602
Mortgage Loans [Member] | RAI PFBL 2018 Purch Fee Note Weatherford [Member]
Interest Rate	12.00%
Final Maturity Date	2021-12
Periodic Payment Terms	Excess cash flow
Carrying Amount of Mortgage	$ 525
Mortgage Loans [Member] | Unified Housing Foundation, Inc. (Echo Station) [Member]
Security	100% Interest in UH of Temple, LLC
Interest Rate	12.00%
Final Maturity Date	2032-12
Periodic Payment Terms	Excess cash flow
Prior Liens	$ 9,719
Face Amount of Mortgage	2,794
Carrying Amount of Mortgage	$ 1,481
Mortgage Loans [Member] | Unified Housing Foundation, Inc. (Lakeshore Villas/HFS of Humble, LLC) [Member]
Security	100% Interest in HFS of Humble, LLC
Interest Rate	12.00%
Final Maturity Date	2032-12
Periodic Payment Terms	Excess cash flow
Prior Liens	$ 15,965
Face Amount of Mortgage	2,959
Carrying Amount of Mortgage	$ 2,000
Mortgage Loans [Member] | Unified Housing Foundation, Inc. (Lakeshore Villas/HFS of Humble, LLC) [Member]
Security	Interest in Unified Housing Foundation Inc.
% of Cash Flow	31.50%
Interest Rate	12.00%
Final Maturity Date	2032-12
Periodic Payment Terms	Excess cash flow
Prior Liens	$ 15,756
Face Amount of Mortgage	8,836
Carrying Amount of Mortgage	$ 6,369
Mortgage Loans [Member] | Unified Housing Foundation, Inc. (Limestone Ranch/UH of Vista Ridge,LLC) [Member]
Interest Rate	12.00%
Final Maturity Date	2032-12
Periodic Payment Terms	Excess cash flow
Carrying Amount of Mortgage	$ 1,953
Mortgage Loans [Member] | Unified Housing Foundation, Inc. (Limestone Ranch/UH of Vista Ridge,LLC) [Member]
Interest Rate	12.00%
Final Maturity Date	2032-12
Periodic Payment Terms	Excess cash flow
Carrying Amount of Mortgage	$ 2,000
Mortgage Loans [Member] | Unified Housing Foundation, Inc. (Limestone Ranch/UH of Vista Ridge,LLC) [Member]
Interest Rate	12.00%
Final Maturity Date	2032-12
Periodic Payment Terms	Excess cash flow
Carrying Amount of Mortgage	$ 4,000
Mortgage Loans [Member] | Unified Housing Foundation, Inc. (Timbers of Terrell) [Member]
Security	100% Interest in UH of Terrell, LLC
Interest Rate	12.00%
Final Maturity Date	2032-12
Periodic Payment Terms	Excess cash flow
Prior Liens	$ 7,294
Face Amount of Mortgage	1,702
Carrying Amount of Mortgage	$ 1,323
Mortgage Loans [Member] | Unified Housing Foundation, Inc (2015 Advisory Fee) [Member]
Interest Rate	12.00%
Final Maturity Date	2021-12
Periodic Payment Terms	Excess cash flow
Carrying Amount of Mortgage	$ 3,994
Mortgage Loans [Member] | Unified Housing Foundation, Inc (2008-2014 Advisory Fee) [Member]
Interest Rate	12.00%
Final Maturity Date	2021-12
Periodic Payment Terms	Excess cash flow
Carrying Amount of Mortgage	$ 6,407
Mortgage Loans [Member] | Unified Housing Foundation, Inc (2018 Advisory Fee) [Member]
Interest Rate	12.00%
Final Maturity Date	2020-06
Periodic Payment Terms	Excess cash flow
Carrying Amount of Mortgage	$ 5,314
Mortgage Loans [Member] | Unified Housing Foundation, Inc [Member]
Security	RAI UHF 2019 Advisory Fee Note
Interest Rate	12.00%
Final Maturity Date	2022-03
Periodic Payment Terms	Excess cash flow
Carrying Amount of Mortgage	$ 4,782
Mortgage Loans [Member] | Unified Housing Foundation, Inc [Member]
Security	2018 Refin Fee (Lakeshore Villas)
Interest Rate	12.00%
Final Maturity Date	2021-07
Periodic Payment Terms	Excess cash flow
Carrying Amount of Mortgage	$ 838
Mortgage Loans [Member] | Unified Housing Foundation, Inc [Member]
Security	2018 Refin Fee (Limestone Ranch)
Interest Rate	12.00%
Final Maturity Date	2021-07
Periodic Payment Terms	Excess cash flow
Carrying Amount of Mortgage	$ 773
Mortgage Loans [Member] | Unified Housing Foundation, Inc [Member]
Security	2018 Refin Fee (Marquis @ Vista Ridge)
Interest Rate	12.00%
Final Maturity Date	2021-07
Periodic Payment Terms	Excess cash flow
Carrying Amount of Mortgage	$ 839
Mortgage Loans [Member] | Unified Housing Foundation, Inc [Member]
Security	2018 Refin Fee (Timbers at the Park)
Interest Rate	12.00%
Final Maturity Date	2021-07
Periodic Payment Terms	Excess cash flow
Carrying Amount of Mortgage	$ 432
Mortgage Loans [Member] | Unified Housing Foundation, Inc [Member]
Security	2018 Refin Fee (Trails @ White Rock)
Interest Rate	12.00%
Final Maturity Date	2021-07
Periodic Payment Terms	Excess cash flow
Carrying Amount of Mortgage	$ 913
Mortgage Loans [Member] | Unified Housing Foundation, Inc [Member]
Security	2018 Refin Fee (Bella Vista)
Interest Rate	12.00%
Final Maturity Date	2021-08
Periodic Payment Terms	Excess cash flow
Carrying Amount of Mortgage	$ 212
Mortgage Loans [Member] | Unified Housing Foundation, Inc [Member]
Security	2017 Fees on Sale LSC/SR/PKCR
Interest Rate	12.00%
Final Maturity Date	2021-10
Periodic Payment Terms	Excess cash flow
Carrying Amount of Mortgage	$ 1,980
Mortgage Loans [Member] | Unified Housing Foundation, Inc [Member]
Security	2017 Fees on Profit LSC/SR/PKCR
Interest Rate	12.00%
Final Maturity Date	2021-10
Periodic Payment Terms	Excess cash flow
Carrying Amount of Mortgage	$ 4,851
Mortgage Loans [Member] | Various Related Party Notes [Member]
Periodic Payment Terms	Excess cash flow
Carrying Amount of Mortgage	$ 3,553
Mortgage Loans [Member] | Various Non-Related Party Notes [Member]
Periodic Payment Terms	Excess cash flow
Carrying Amount of Mortgage	$ 28,989