Note 1 - Basis of Presentation and Accounting Policies - Held to Maturity Securities (Details) - US Treasury Securities [Member] - USD ($) $ in Thousands |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Held to maturity U.S. Treasury securities, amortized cost | $ 0 | $ 950 |
| Held to maturity U.S. Treasury securities, gross unrealized gains | 0 | 26 |
| Held to maturity U.S. Treasury securities, fair value | $ 0 | $ 977 |
| X | ||||||||||
- Definition Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity). Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
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| X | ||||||||||
- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Details
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