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Mortgages and Other Notes Payable - Schedule of Debt (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 188,004	$ 183,392
Loss on early extinguishment of debt	(2,805)	(1,451)	$ 0
770 South Post Oak
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 11,406	11,635
Interest Rate	4.40%
Athens
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 1,155	1,155
Interest Rate	4.00%
Blue Lake Villas
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 9,673	0
Interest Rate	3.15%
Blue Lake Villas Phase II
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 3,424	0
Interest Rate	2.85%
Chelsea
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 7,875	8,037
Interest Rate	3.40%
EQK Portage
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 3,350	3,350
Interest Rate	10.00%
Forest Grove
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 7,128	7,263
Interest Rate	3.75%
Landing Bayou
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 14,161	14,407
Interest Rate	3.50%
Legacy at Pleasant Grove
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 13,039	13,352
Interest Rate	3.60%
New Concept Energy
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 3,542	3,542
Interest Rate	6.00%
Northside on Travis
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 11,656	0
Interest Rate	2.50%
Parc at Denham Springs
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 16,737	0
Interest Rate	3.75%
Parc at Denham Springs Phase II
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 15,789	15,962
Interest Rate	4.05%
RCM HC Enterprises
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 5,086	5,086
Interest Rate	5.00%
Residences at Holland Lake
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 10,622	0
Interest Rate	3.60%
Stanford Center
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 0	38,979
Interest Rate	6.00%
Loss on early extinguishment of debt	$ (1,639)
Sugar Mill Phase III
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 0	9,216
Interest Rate	4.50%
Loss on early extinguishment of debt	$ (1,166)
Toulon
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 0	13,697
Interest Rate	3.20%
Villas at Bon Secour
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 19,410	19,492
Interest Rate	3.08%
Villas of Park West I
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 9,373	0
Interest Rate	3.04%
Villas of Park West II
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 8,504	0
Interest Rate	3.18%
Vista Ridge
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 9,674	9,830
Interest Rate	4.00%
Windmill Farms
Debt Instrument [Line Items]
Mortgages and other notes payable	$ 6,400	$ 8,389
Interest Rate	5.00%

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Contractual interest rate for funds borrowed, under the debt agreement.

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