Note 3 - Investment Securities (Details Textual) - USD ($) |
3 Months Ended | 6 Months Ended | ||||
|---|---|---|---|---|---|---|
Jun. 30, 2025 |
Mar. 31, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
Dec. 31, 2024 |
|
| Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss | $ 278,200 | $ 278,200 | $ 302,500 | |||
| Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss | 123,200 | 123,200 | 122,000 | |||
| Proceeds from Sale of Debt Securities, Available-for-Sale | 0 | $ 521,000 | 0 | $ 521,000 | ||
| Gain (Loss) from Hedged Firm Commitment Not Qualifying as Fair Value Hedge, Net | 0 | $ 94,000 | 0 | 94,000 | 0 | |
| Debt Securities, Available-for-Sale, Realized Gain (Loss) | $ (32,000) | $ (32,000) | ||||
| Asset Pledged as Collateral [Member] | Government Deposits and Securities Sold Under Repurchase Agreement [Member] | ||||||
| Debt Securities | $ 24,200,000 | $ 24,200,000 | $ 26,300,000 | |||
| X | ||||||||||
- Definition Amount, after allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), investment in debt security measured at amortized cost (held-to-maturity), and investment in debt security measured at fair value with change in fair value recognized in net income (trading). Reference 1: http://www.xbrl.org/2003/role/exampleRef
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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 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 | ||||||||||
- Definition Amount, after 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 net gain (loss) recognized in earnings when a hedged firm commitment no longer qualifies as a fair value hedge. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| 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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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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