Notes Receivable (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2020	Dec. 31, 2019
Carrying value		$ 123,854	$ 112,357
ABC Land and Development, Inc. [Member]
Carrying value		$ 7,408	7,408
Interest rate		9.50%
Description of maturity date		06/21
ABC Paradise, LLC [Member]
Carrying value		$ 1,210	1,210
Interest rate		9.50%
Description of maturity date		06/21
Autumn Breeze [Member]
Carrying value	[1]	$ 1,807	1,302
Interest rate	[1]	5.00%
Description of maturity date	[1]	10/21
Bellwether Ridge [Member]
Carrying value	[1]	$ 3,559	3,765
Interest rate	[1]	5.00%
Description of maturity date	[1]	11/20
Big River NV LLC [Member]
Carrying value		$ 344
Interest rate
Description of maturity date		07/20
Forest Pines Phase I [Member]
Carrying value	[1]	$ 2,869	2,868
Interest rate	[1]	5.00%
Description of maturity date	[1]	11/20
JEM Holdings, Inc [Member]
Carrying value		$ 300	300
Interest rate		6.00%
Description of maturity date		07/16
One Realco Land Holding, Inc [Member]
Carrying value		$ 1,728	1,728
Interest rate		9.50%
Description of maturity date		06/21
Oulad-Chikh Family Trust [Member]
Carrying value		$ 174	174
Interest rate		8.00%
Description of maturity date		03/21
Parc at Ingleside [Member]
Carrying value	[1]	$ 2,294	1,531
Interest rate	[1]	5.00%
Description of maturity date	[1]	12/21
Parc at Windmill Farms [Member]
Carrying value	[1]	$ 7,949	7,602
Interest rate	[1]	5.00%
Description of maturity date	[1]	11/20
Phillips Foundation for Better Living, Inc. [Member]
Carrying value			314
Interest rate		12.00%
Description of maturity date		03/22
Plum Tree [Member]
Carrying value	[1]	$ 792	413
Interest rate	[1]	5.00%
Description of maturity date	[1]	10/21
Prospectus Endeavors 4, LLC [Member]
Carrying value		$ 5,907	5,907
Interest rate		12.00%
Description of maturity date		01/23
Prospectus Endeavors 6, LLC [Member]
Carrying value		$ 496	496
Interest rate		12.00%
Description of maturity date		10/22
Riverview on the Park Land, LLC [Member]
Carrying value		$ 1,045	1,045
Interest rate		9.50%
Description of maturity date		06/21
RNC Revolving Line of Credit [Member]
Carrying value		$ 8,853	8,802
Interest rate		5.00%
Description of maturity date		09/24
Spyglass of Ennis [Member]
Carrying value	[1]	$ 5,359	5,288
Interest rate	[1]	5.00%
Description of maturity date	[1]	11/20
Steeple Crest [Member]
Carrying value	[1]	$ 6,498	6,665
Interest rate	[1]	5.00%
Description of maturity date	[1]	08/21
TPS Income, Inc [Member]
Carrying value		$ 4,554	4,554
Interest rate		6.00%
Description of maturity date		09/20
Unified Housing Foundation, Inc [Member]
Carrying value	[2]	$ 10,401	10,401
Interest rate	[2]	12.00%
Description of maturity date	[2]	12/21
Unified Housing Foundation, Inc [Member]
Carrying value	[2]	$ 10,096	10,096
Interest rate	[2]	12.00%
Description of maturity date	[2]	03/22
Unified Housing Foundation, Inc [Member]
Carrying value	[2]	$ 2,882	3,795
Interest rate	[2]	12.00%
Description of maturity date	[2]	07/21
Unified Housing Foundation, Inc [Member]
Carrying value	[2]	$ 212	212
Interest rate	[2]	12.00%
Description of maturity date	[2]	08/21
Unified Housing Foundation, Inc [Member]
Carrying value	[2]	$ 7,051	6,831
Interest rate	[2]	12.00%
Description of maturity date	[2]	03/23
Unified Housing Foundation, Inc [Member]
Carrying value	[2]	$ 3,615
Interest rate	[2]	12.00%
Description of maturity date	[2]	05/23
Unified Housing Foundation, Inc [Member]
Carrying value	[2]	$ 6,831
Interest rate	[2]	12.00%
Description of maturity date	[2]	10/21
Unified Housing Foundation, Inc [Member]
Carrying value	[2]	$ 495	525
Interest rate	[2]	12.00%
Description of maturity date	[2]	12/21
Unified Housing Foundation, Inc [Member]
Carrying value	[2]	$ 19,125	$ 19,125
Interest rate	[2]	12.00%
Description of maturity date	[2]	12/32

[1] The note is convertible, at our option, into a 100% ownership interest in the underlying development property, and are collateralized by the underlying development property.

[2] Principal and interest payments on the notes from Unified Housing Foundation, Inc. ("UHF") are funded from surplus cash flow from operations, sale or refinancing of the underlying properties and are cross collateralized to the extent that any surplus cash available from any of the properties underlying the notes. UHF is determined to be a related party due to our significant investment in the performance of the collateral secured by the notes receivable.