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Note 4 - Other Accrued Liabilities | 9 Months Ended
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Sep. 30, 2025
Notes to Financial Statements |
Other Liabilities Disclosure [Text Block] | Note 4. Other Accrued Liabilities Other accrued liabilities consist of the following as of September 30, 2025 and December 31, 2024:
|  | September 30, |  |  | December 31, |
|  | 2025 |  |  | 2024 |
Professional services |  | $ | 75,000 |  |  | $ | 167,000 |
Operating costs |  |  | 1,082,000 |  |  |  | 858,000 |
Other |  |  | 912,000 |  |  |  | 863,000 |
Total other accrued liabilities |  | $ | 2,069,000 |  |  | $ | 1,888,000 |

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