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Note 4 - Other Accrued Liabilities (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2025
Notes Tables |
Other Liabilities [Table Text Block] |
|  | 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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- Definition Tabular disclosure of other liabilities. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration