| Note 5 - Right-of-use Asset and Lease Liability - Lease Information (Details) - USD ($) $ in Thousands | 12 Months Ended | |
|---|---|---|
| Dec. 31, 2024 | Dec. 31, 2023 | |
| Cash paid for operating lease liabilities | $ 725 | $ 627 | 
| Right-of-use assets obtained in exchange for new operating lease obligations | $ 1,549 | $ 0 | 
| Weighted-average remaining lease term (years) (Year) | 3 years 6 months | 3 years 2 months 12 days | 
| Weighted-average discount rate | 5.50% | 3.60% | 
| X | ||||||||||
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- Definition Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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| X | ||||||||||
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- Definition Weighted average discount rate for operating lease calculated at point in time. Reference 1: http://www.xbrl.org/2003/role/exampleRef 
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| X | ||||||||||
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- Definition Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/exampleRef 
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| X | ||||||||||
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- Definition Amount of increase in right-of-use asset obtained in exchange for operating lease liability. Reference 1: http://www.xbrl.org/2003/role/exampleRef 
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