Note 2 - Investments (Details Textual) - USD ($) |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
|
| Debt Securities, Held-to-Maturity, Accrued Interest, before Allowance for Credit Loss | $ 672,000 | $ 672,000 | $ 271,000 | ||
| Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss | 1,100,000 | 1,100,000 | 1,200,000 | ||
| Debt Securities, Held-to-Maturity, Nonaccrual | 0 | 0 | $ 0 | ||
| Expected Credit Losses on Investments | 0 | $ 0 | 0 | $ 0 | |
| Proceeds from Sale of Debt Securities, Available-for-Sale | $ 0 | $ 0 | $ 0 | $ 0 | |
| X | ||||||||||
- Definition The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income. No definition available.
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| X | ||||||||||
- Definition Amount, after allowance for credit loss, 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). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount, before allowance for credit loss, of accrued interest on 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 | ||||||||||
- Definition Amount of investment in debt security measured at amortized cost (held-to-maturity) on nonaccrual status. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of cash inflow from sale 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/2003/role/disclosureRef
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