NOTES AND INTEREST RECEIVABLE (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accrued interest		$ 8,629
Notes and interest receivable		120,986	$ 83,541	$ 70,166	$ 81,133
Performing Loans [Member]
Notes and interest receivable		122,811
Accrued interest		8,629
Allowance for estimated losses		(1,825)
Notes and interest receivable		$ 120,986
Performing Loans [Member] | Prospectus Endeavors 4, LLC [Member]
Maturity Date		Jan. 31, 2023
Description of property		Prospectus Endeavors 4, LLC
Interest Rate		12.00%
Notes and interest receivable		$ 5,907
Description of Security		Secured
Performing Loans [Member] | Prospectus Endeavors 6, LLC [Member]
Maturity Date		Oct. 31, 2022
Description of property		Prospectus Endeavors 6, LLC
Interest Rate		12.00%
Notes and interest receivable		$ 496
Description of Security		Secured
Performing Loans [Member] | Oulan-Chikh Family Trust [Member]
Maturity Date		Mar. 31, 2021
Description of property		Oulan-Chikh Family Trust
Interest Rate		8.00%
Notes and interest receivable		$ 174
Description of Security		Secured
Performing Loans [Member] | H198, LLC (McKinney Ranch Land) [Member]
Maturity Date		Sep. 30, 2020
Description of property		H198, LLC (McKinney Ranch Land
Interest Rate		6.00%
Notes and interest receivable		$ 4,554
Description of Security		Secured
Performing Loans [Member] | Forest Pines [Member]
Maturity Date		Nov. 30, 2020
Description of property		Forest Pines
Interest Rate		5.00%
Notes and interest receivable		$ 2,868
Description of Security		Secured
Performing Loans [Member] | Spyglass Apartments of Ennis, LP [Member]
Maturity Date		Nov. 30, 2020
Description of property		Spyglass Apartments of Ennis, LP
Interest Rate		5.00%
Notes and interest receivable		$ 5,288
Description of Security		Secured
Performing Loans [Member] | Bellwether Ridge [Member]
Maturity Date		May 31, 2020
Description of property		Bellwether Ridge
Interest Rate		5.00%
Notes and interest receivable		$ 3,765
Description of Security		Secured
Performing Loans [Member] | Parc at Windmill Farms [Member]
Maturity Date		May 31, 2020
Description of property		Parc at Windmill Farms
Interest Rate		5.00%
Notes and interest receivable		$ 7,602
Description of Security		Secured
Performing Loans [Member] | RAI PFBL 2018 Purch Fee Note Weatherford [Member]
Maturity Date		Dec. 31, 2021
Description of property		RAI PFBL 2018 Purch Fee Note Weatherford
Interest Rate		12.00%
Notes and interest receivable		$ 525
Description of Security		Secured
Performing Loans [Member] | Autumn Breeze [Member]
Maturity Date		Oct. 31, 2021
Description of property		Autumn Breeze
Interest Rate		5.00%
Notes and interest receivable		$ 1,302
Description of Security		Secured
Performing Loans [Member] | Plum Tree [Member]
Maturity Date		Oct. 31, 2021
Description of property		Plum Tree
Interest Rate		5.00%
Notes and interest receivable		$ 413
Description of Security		Secured
Performing Loans [Member] | Ingleside [Member]
Maturity Date		Dec. 31, 2021
Description of property		Ingleside
Interest Rate		5.00%
Notes and interest receivable		$ 1,531
Description of Security		Secured
Performing Loans [Member] | RNC [Member]
Maturity Date		Sep. 30, 2024
Description of property		RNC
Interest Rate		5.00%
Notes and interest receivable		$ 8,802
Description of Security		Secured
Performing Loans [Member] | Revolving Line of Credit Steeple Crest [Member]
Maturity Date		Oct. 31, 2020
Description of property		Revolving Line of Credit Steeple Crest
Interest Rate		5.00%
Notes and interest receivable		$ 6,665
Description of Security		Secured
Performing Loans [Member] | Unified Housing Foundation, Inc. (Echo Station) [Member]
Maturity Date	[1]	Dec. 31, 2032
Description of property	[1]	Unified Housing Foundation, Inc. (Echo Station)
Interest Rate	[1]	12.00%
Notes and interest receivable	[1]	$ 1,481
Description of Security	[1]	Secured
Performing Loans [Member] | Unified Housing Foundation, Inc. (Lakeshore Villas) [Member]
Maturity Date	[1]	Dec. 31, 2032
Description of property	[1]	Unified Housing Foundation, Inc. (Lakeshore Villas)
Interest Rate	[1]	12.00%
Notes and interest receivable	[1]	$ 2,000
Description of Security	[1]	Secured
Performing Loans [Member] | Unified Housing Foundation, Inc. (Lakeshore Villas) [Member]
Maturity Date	[1]	Dec. 31, 2032
Description of property	[1]	Unified Housing Foundation, Inc. (Lakeshore Villas)
Interest Rate	[1]	12.00%
Notes and interest receivable	[1]	$ 6,369
Description of Security	[1]	Secured
Performing Loans [Member] | Unified Housing Foundation, Inc. (Limestone Ranch) [Member]
Maturity Date	[1]	Dec. 31, 2032
Description of property	[1]	Unified Housing Foundation, Inc. (Limestone Ranch)
Interest Rate	[1]	12.00%
Notes and interest receivable	[1]	$ 1,953
Description of Security	[1]	Secured
Performing Loans [Member] | Unified Housing Foundation, Inc. (Limestone Ranch) [Member]
Maturity Date	[1]	Dec. 31, 2032
Description of property	[1]	Unified Housing Foundation, Inc. (Limestone Ranch)
Interest Rate	[1]	12.00%
Notes and interest receivable	[1]	$ 2,000
Description of Security	[1]	Secured
Performing Loans [Member] | Unified Housing Foundation, Inc. (Limestone Ranch) [Member]
Maturity Date	[1]	Dec. 31, 2032
Description of property	[1]	Unified Housing Foundation, Inc. (Limestone Ranch)
Interest Rate	[1]	12.00%
Notes and interest receivable	[1]	$ 4,000
Description of Security	[1]	Secured
Performing Loans [Member] | Unified Housing Foundation, Inc. (Timbers of Terrell) [Member]
Maturity Date	[1]	Dec. 31, 2032
Description of property	[1]	Unified Housing Foundation, Inc. (Timbers of Terrell)
Interest Rate	[1]	12.00%
Notes and interest receivable	[1]	$ 1,323
Description of Security	[1]	Secured
Performing Loans [Member] | Unified Housing Foundation, Inc. #4 [Member]
Maturity Date	[1]	Dec. 31, 2021
Description of property	[1]	Unified Housing Foundation, Inc.
Interest Rate	[1]	12.00%
Notes and interest receivable	[1]	$ 10,401
Description of Security	[1]	Unsecured
Performing Loans [Member] | Unified Housing Foundation, Inc. #5 [Member]
Maturity Date	[1]	Jun. 30, 2020
Description of property	[1]	Unified Housing Foundation, Inc.
Interest Rate	[1]	12.00%
Notes and interest receivable	[1]	$ 5,314
Description of Security	[1]	Unsecured
Performing Loans [Member] | Unified Housing Foundation, Inc. #6 [Member]
Maturity Date	[1]	Mar. 31, 2022
Description of property	[1]	Unified Housing Foundation, Inc.
Interest Rate	[1]	12.00%
Notes and interest receivable	[1]	$ 4,782
Description of Security	[1]	Unsecured
Performing Loans [Member] | Unified Housing Foundation, Inc. (Lakeshore Villas) [Member]
Maturity Date	[1]	Jul. 31, 2021
Description of property	[1]	Unified Housing Foundation, Inc. (Lakeshore Villas)
Interest Rate	[1]	12.00%
Notes and interest receivable	[1]	$ 838
Description of Security	[1]	Secured
Performing Loans [Member] | Unified Housing Foundation, Inc. (Limestone Ranch) [Member]
Maturity Date	[1]	Jul. 31, 2021
Description of property	[1]	Unified Housing Foundation, Inc. (Limestone Ranch)
Interest Rate	[1]	12.00%
Notes and interest receivable	[1]	$ 773
Description of Security	[1]	Secured
Performing Loans [Member] | Unified Housing Foundation, Inc. (Marquis at Vista Ridge) [Member]
Maturity Date	[1]	Jul. 31, 2021
Description of property	[1]	Unified Housing Foundation, Inc. (Marquis at Vista Ridge)
Interest Rate	[1]	12.00%
Notes and interest receivable	[1]	$ 839
Description of Security	[1]	Secured
Performing Loans [Member] | Unified Housing Foundation, Inc. (Timbers at the Park) [Member]
Maturity Date	[1]	Jul. 31, 2021
Description of property	[1]	Unified Housing Foundation, Inc. (Timbers at the Park)
Interest Rate	[1]	12.00%
Notes and interest receivable	[1]	$ 432
Description of Security	[1]	Secured
Performing Loans [Member] | Unified Housing Foundation, Inc. (Trails at White Rock) [Member]
Maturity Date	[1]	Jul. 31, 2021
Description of property	[1]	Unified Housing Foundation, Inc. (Trails at White Rock)
Interest Rate	[1]	12.00%
Notes and interest receivable	[1]	$ 913
Description of Security	[1]	Secured
Performing Loans [Member] | Unified Housing Foundation, Inc. (Bella Vista) [Member]
Maturity Date	[1]	Aug. 31, 2021
Description of property	[1]	Unified Housing Foundation, Inc. (Bella Vista)
Interest Rate	[1]	12.00%
Notes and interest receivable	[1]	$ 212
Description of Security	[1]	Secured
Performing Loans [Member] | Unified Housing Foundation, Inc. #7 [Member]
Maturity Date	[1]	Oct. 31, 2021
Description of property	[1]	Unified Housing Foundation, Inc.
Interest Rate	[1]	12.00%
Notes and interest receivable	[1]	$ 6,831
Description of Security	[1]	Unsecured
Performing Loans [Member] | Other Related Party Notes [Member]
Description of maturity date		Various
Description of property		Other related party notes
Description of Interest Rate		Various
Notes and interest receivable		$ 3,553
Description of Security		Various secured interests
Performing Loans [Member] | Other Non-Related Party Notes [Member]
Description of maturity date		Various
Description of property		Other non-related party notes
Description of Interest Rate		Various
Notes and interest receivable		$ 10,276
Description of Security		Various secured interests

[1] Related party notes