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Mortgages and Other Notes Payable - Schedule of Debt (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Feb. 28, 2023 | Dec. 31, 2022
--- | --- | --- | ---
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Mortgages and other notes payable | $ 187,179 |  | $ 188,004
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] |  |  |
Mortgages and other notes payable | $ 11,345 |  | 11,406
Effective interest rate | 4.40% |  |
Mortgages and Other Notes Payable | Athens |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Mortgages and other notes payable | $ 1,155 |  | 1,155
Effective interest rate | 4.00% |  |
Mortgages and Other Notes Payable | Blue Lake Villas |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Mortgages and other notes payable | $ 9,631 |  | 9,673
Effective 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] |  |  |
Mortgages and other notes payable | $ 3,405 |  | 3,424
Effective 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] |  |  |
Mortgages and other notes payable | $ 7,834 |  | 7,875
Effective 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] |  |  |
Mortgages and other notes payable | $ 3,350 |  | 3,350
Effective 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] |  |  |
Mortgages and other notes payable | $ 7,092 |  | 7,128
Effective interest rate | 3.75% |  |
Mortgages and Other Notes Payable | Landing Bayou |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Mortgages and other notes payable | $ 14,099 |  | 14,161
Effective 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] |  |  |
Mortgages and other notes payable | $ 12,960 |  | 13,039
Effective 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] |  |  |
Mortgages and other notes payable | $ 3,542 |  | 3,542
Effective 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] |  |  |
Mortgages and other notes payable | $ 11,591 |  | 11,656
Effective 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] |  |  |
Mortgages and other notes payable | $ 16,653 |  | 16,737
Effective 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] |  |  |
Mortgages and other notes payable | $ 15,744 |  | 15,789
Effective 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] |  |  |
Mortgages and other notes payable | $ 5,086 |  | 5,086
Effective 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] |  |  |
Mortgages and other notes payable | $ 10,573 |  | 10,622
Effective 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] |  |  |
Mortgages and other notes payable | $ 19,310 |  | 19,410
Effective 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] |  |  |
Mortgages and other notes payable | $ 9,326 |  | 9,373
Effective 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] |  |  |
Mortgages and other notes payable | $ 8,462 |  | 8,504
Effective 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] |  |  |
Mortgages and other notes payable | $ 9,634 |  | 9,674
Effective 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] |  |  |
Mortgages and other notes payable | $ 6,387 |  | $ 6,400
Effective interest rate | 7.75% | 7.75% |

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