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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
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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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