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Note 4 - Real Property and Other Income, Expense (Details Textual) $ in Millions | Sep. 30, 2025 USD ($) ft² | Dec. 31, 2024 USD ($)
--- | --- | ---
Lessor, Operating Lease, Payment to be Received, Remainder of Fiscal Year | $ 0.2 |
Lessor, Operating Lease, Payment to be Received, Year One | 0.8 |
Lessor, Operating Lease, Payment to be Received, Year Two | 0.6 |
Lessor, Operating Lease, Payment to be Received, Year Three | 0.4 |
Lessor, Operating Lease, Payment to be Received, Year Four | 0.5 |
Lessor, Operating Lease, Payment to be Received, Year Five | $ 1.0 |
Office Building [Member] | TEXAS |  |
Net Rentable Area (Square Foot) | ft² | 90,000 |
Percentage of Occupancy | 25.00% |
Accrual for Taxes Other than Income Taxes, Current | $ 0.2 | $ 0.3

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