Note 7 - Available-for-Sale Securities (Details Textual) |
3 Months Ended | ||
|---|---|---|---|
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Mar. 31, 2026
USD ($)
AvailableForSaleSecurity
|
Mar. 31, 2025
USD ($)
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Dec. 31, 2025
USD ($)
|
|
| Investments, Debt and Equity Securities [Abstract] | |||
| Credit allowance | $ 0 | $ 0 | |
| Accrued interest receivable on available-for-sale securities | $ 100,000 | 100,000 | |
| Available-for-sale securities, that were in a gross unrealized loss position for less than 12 months | AvailableForSaleSecurity | 113 | ||
| Available-for-sale securities that were in a gross unrealized loss position for less than 12 months, fair value | $ 177,100,000 | ||
| Available-for-sale securities, fair value | $ 216,957,000 | $ 114,108,000 | |
| Available-for-sale securities, that were in a gross unrealized loss position for than 12 months or more | AvailableForSaleSecurity | 0 | ||
| Available-for sale securities, accrued interest writeoff | $ 0 | $ 0 | |
| Available-for-sale securities, realized gains or losses | $ 0 | $ 0 | |
| X | ||||||||||
- Definition Debt securities, available-for-sale, accrued interest, receivable. No definition available.
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| X | ||||||||||
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of writeoff of accrued interest on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), recognized by reversing interest income. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without an allowance for credit loss. Includes beneficial interest in securitized financial asset. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without an allowance for credit loss. Includes beneficial interest in securitized financial asset. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- References No definition available.
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