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Mortgages and Other Notes Payable - Schedule of Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Feb. 08, 2024	Dec. 31, 2023
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 181,827		$ 182,683
Mortgages and Other Notes Payable | 770 South Post Oak
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 11,126		11,187
Interest Rate	4.40%
Mortgages and Other Notes Payable | Blue Lake Villas
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 9,459		9,503
Interest Rate	3.15%
Mortgages and Other Notes Payable | Blue Lake Villas Phase II
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 3,329		3,349
Interest Rate	2.85%
Mortgages and Other Notes Payable | Chelsea
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 8,018		8,064
Interest Rate	3.40%
Mortgages and Other Notes Payable | EQK Portage
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 3,350		3,350
Interest Rate	10.00%
Mortgages and Other Notes Payable | Forest Grove
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 6,951		6,988
Interest Rate	3.75%
Mortgages and Other Notes Payable | Landing on Bayou Cane
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 14,373		14,442
Interest Rate	3.50%
Mortgages and Other Notes Payable | Legacy at Pleasant Grove
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 12,633		12,716
Interest Rate	3.60%
Mortgages and Other Notes Payable | New Concept Energy
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 3,542		3,542
Interest Rate	6.00%
Mortgages and Other Notes Payable | Northside on Travis
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 11,327		11,394
Interest Rate	2.50%
Mortgages and Other Notes Payable | Parc at Denham Springs
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 16,312		16,399
Interest Rate	3.75%
Mortgages and Other Notes Payable | Parc at Denham Springs Phase II
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 15,562		15,608
Interest Rate	4.05%
Mortgages and Other Notes Payable | RCM HC Enterprises
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 5,086		5,086
Interest Rate	5.00%
Mortgages and Other Notes Payable | Residences at Holland Lake
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 10,373		10,424
Interest Rate	3.60%
Mortgages and Other Notes Payable | Villas at Bon Secour
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 19,104		19,205
Interest Rate	3.08%
Mortgages and Other Notes Payable | Villas of Park West I
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 9,132		9,181
Interest Rate	3.04%
Mortgages and Other Notes Payable | Villas of Park West II
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 8,290		8,334
Interest Rate	3.18%
Mortgages and Other Notes Payable | Vista Ridge
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 9,470		9,512
Interest Rate	4.00%
Mortgages and Other Notes Payable | Windmill Farms
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Carrying Value	$ 4,390		$ 4,399
Interest Rate	7.50%	7.50%

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