Note 13 - Derivatives and Hedging Activities - Derivatives (Details) - USD ($) |
Sep. 30, 2026 |
Dec. 31, 2025 |
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|---|---|---|---|---|---|---|---|---|---|---|---|
| Asset-Backed Securities [Member] | |||||||||||
| Derivative, fair value | $ 194,000 | $ 980,000 | |||||||||
| Closed Portfolio of Loans Receivable [Member] | |||||||||||
| Derivative, fair value | 353,000 | 903,000 | |||||||||
| Designated as Hedging Instrument [Member] | |||||||||||
| Derivative, carrying amount | 126,101,000 | 151,883,000 | |||||||||
| Derivative, fair value | (547,000) | 1,883,000 | |||||||||
| Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Asset-Backed Securities [Member] | |||||||||||
| Derivative, carrying amount | [2] | 49,806,000 | [1] | 50,980,000 | |||||||
| Derivative, fair value | [2] | (194,000) | 980,000 | ||||||||
| Interest Rate Contract [Member] | Designated as Hedging Instrument [Member] | Closed Portfolio of Loans Receivable [Member] | |||||||||||
| Derivative, carrying amount | [4] | 76,295,000 | [3] | 100,903,000 | |||||||
| Derivative, fair value | [4] | $ (353,000) | $ 903,000 | ||||||||
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