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Note 9 - Fair Value Measurements - Schedule of Schedule of Financial Assets and Liabilities on a Recurring and Non-recurring Basis (Details) - Fair Value, Inputs, Level 3 [Member] | Sep. 30, 2025 | Dec. 31, 2024
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Minimum [Member] | Interest Rate Lock Commitments [Member] | Fair Value, Recurring [Member] | Valuation, Market Approach [Member] | Pull-through Expectations Rate [Member] |  |
Interest rate lock commitments with customers | 0.80 |
Minimum [Member] | Individual Forward Sale Commitments With Investors [Member] | Fair Value, Recurring [Member] | Valuation, Market Approach [Member] | Pull-through Expectations Rate [Member] |  |
Interest rate lock commitments with customers | 0.80 |
Minimum [Member] | Collateral Dependent Loans [Member] | Fair Value, Nonrecurring [Member] | Fair Value of Underlying Collateral [Member] | Measurement Input, Discount Rate [Member] |  |
Collateral dependent loans | 0 |
Minimum [Member] | Mortgage Servicing Rights [Member] | Fair Value, Nonrecurring [Member] | Industry Sources [Member] | Measurement Input, Prepayment Rate [Member] |  |
Collateral dependent loans | 0 |
Maximum [Member] | Interest Rate Lock Commitments [Member] | Fair Value, Recurring [Member] | Valuation, Market Approach [Member] | Pull-through Expectations Rate [Member] |  |
Interest rate lock commitments with customers | 0.99 |
Maximum [Member] | Individual Forward Sale Commitments With Investors [Member] | Fair Value, Recurring [Member] | Valuation, Market Approach [Member] | Pull-through Expectations Rate [Member] |  |
Interest rate lock commitments with customers | 0.99 |
Maximum [Member] | Collateral Dependent Loans [Member] | Fair Value, Nonrecurring [Member] | Fair Value of Underlying Collateral [Member] | Measurement Input, Discount Rate [Member] |  |
Collateral dependent loans | 0.25 |
Maximum [Member] | Mortgage Servicing Rights [Member] | Fair Value, Nonrecurring [Member] | Industry Sources [Member] | Measurement Input, Prepayment Rate [Member] |  |
Collateral dependent loans | 0.50 |
Weighted Average [Member] | Interest Rate Lock Commitments [Member] | Fair Value, Recurring [Member] | Valuation, Market Approach [Member] | Pull-through Expectations Rate [Member] |  |
Interest rate lock commitments with customers | 0.899 | 0.94
Weighted Average [Member] | Individual Forward Sale Commitments With Investors [Member] | Fair Value, Recurring [Member] | Valuation, Market Approach [Member] | Pull-through Expectations Rate [Member] |  |
Interest rate lock commitments with customers | 0.899 | 0.94
Weighted Average [Member] | Collateral Dependent Loans [Member] | Fair Value, Nonrecurring [Member] | Fair Value of Underlying Collateral [Member] | Measurement Input, Discount Rate [Member] |  |
Collateral dependent loans | 0.12 | 0
Weighted Average [Member] | Mortgage Servicing Rights [Member] | Fair Value, Nonrecurring [Member] | Industry Sources [Member] | Measurement Input, Prepayment Rate [Member] |  |
Collateral dependent loans | 0.083 | 0.083

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