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Note 16 - Fair Value Measurements and Fair Value of Financial Instruments - Financial Assets and Liabilities Measured on a Non-recurring Basis (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Total Losses | $ 9,909 |  | $ 4,296 |  | $ 4,145 |
Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 52,210 |  | 27,756 |  |  |
Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 0 |  | 0 |  |  |
Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 0 |  | 0 |  |  |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 52,210 |  | 27,756 |  |  |
Impaired Loans [Member] |  |  |  |  |  |
Total Losses | 9,762 |  | 4,069 |  | 3,877 |
Impaired Loans [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 26,459 |  | 7,073 |  |  |
Impaired Loans [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 0 |  | 0 |  |  |
Impaired Loans [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 0 |  | 0 |  |  |
Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 26,459 |  | 7,073 |  |  |
Impaired Loans [Member] | Commercial Portfolio Segment [Member] |  |  |  |  |  |
Total Losses | 5,654 |  | 0 |  | 1,786 |
Impaired Loans [Member] | Commercial Portfolio Segment [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 10,896 |  | 191 |  |  |
Impaired Loans [Member] | Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 0 |  | 0 |  |  |
Impaired Loans [Member] | Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 0 |  | 0 |  |  |
Impaired Loans [Member] | Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 10,896 |  | 191 |  |  |
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |
Total Losses | 4,049 |  | 4,069 |  | 2,091 |
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 15,320 |  | 6,882 |  |  |
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 0 |  | 0 |  |  |
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 0 |  | 0 |  |  |
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 15,320 |  | 6,882 |  |  |
Impaired Loans [Member] | Residential Mortgage and Equity Lines [Member] |  |  |  |  |  |
Total Losses | 59 |  | 0 |  |  |
Impaired Loans [Member] | Residential Mortgage and Equity Lines [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 243 |  |  |  |  |
Impaired Loans [Member] | Residential Mortgage and Equity Lines [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 0 |  |  |  |  |
Impaired Loans [Member] | Residential Mortgage and Equity Lines [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 0 |  |  |  |  |
Impaired Loans [Member] | Residential Mortgage and Equity Lines [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 243 |  |  |  |  |
Other Real Estate Owned [Member] |  |  |  |  |  |
Total Losses | 0 | [1] | 0 | [1],[2] | 0 | [2]
Other Real Estate Owned [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 24,126 | [1] | 20,446 | [2] |  |
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 0 | [1] | 0 | [2] |  |
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 0 | [1] | 0 | [2] |  |
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 24,126 | [1] | 20,446 | [2] |  |
Investments in Venture Capital [Member] |  |  |  |  |  |
Total Losses | 147 |  | 227 |  | $ 268 |
Investments in Venture Capital [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 86 |  | 237 |  |  |
Investments in Venture Capital [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 0 |  | 0 |  |  |
Investments in Venture Capital [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 0 |  | 0 |  |  |
Investments in Venture Capital [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 86 |  | 237 |  |  |
Other Equity Securities [Member] |  |  |  |  |  |
Total Losses | 0 |  | $ 0 |  |  |
Other Equity Securities [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 1,539 |  |  |  |  |
Other Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 0 |  |  |  |  |
Other Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | 0 |  |  |  |  |
Other Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |
Total at Fair Value | $ 1,539 |  |  |  |  |
[1] | Other real estate owned balance of $14.4 million in the Consolidated Balance Sheets is net of estimated disposal costs.
[2] | Other real estate owned balance of 19.4 million in the Consolidated Balance Sheets is net of estimated disposal costs.

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