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Note 12 - Fair Value Measurements and Fair Value of Financial Instruments - Financial Assets Measured on a Non-recurring Basis (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024 | Dec. 31, 2023
Total Losses | $ 9,342 |  | $ 13,268 |  | $ 3,728 |  | $ 5,017 |  | $ 9,909 |  | $ 4,296 |
Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 74,427 |  |  |  | 74,427 |  |  |  | 52,210 |  |  |
Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 0 |  |  |  | 0 |  |  |  | 0 |  |  |
Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 0 |  |  |  | 0 |  |  |  | 0 |  |  |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 74,427 |  |  |  | 74,427 |  |  |  | 52,210 |  |  |
Impaired Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total Losses | 9,342 |  | 13,268 |  | 3,728 |  | 5,017 |  | 9,762 |  | 4,069 |
Impaired Loans [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 38,058 |  |  |  | 38,058 |  |  |  | 26,459 |  |  |
Impaired Loans [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 0 |  |  |  | 0 |  |  |  | 0 |  |  |
Impaired Loans [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 0 |  |  |  | 0 |  |  |  | 0 |  |  |
Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 38,058 |  |  |  | 38,058 |  |  |  | 26,459 |  |  |
Impaired Loans [Member] | Commercial Portfolio Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total Losses | 9,028 |  | 9,115 |  | 1,923 |  | 2,961 |  | 5,654 |  | 0 |
Impaired Loans [Member] | Commercial Portfolio Segment [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 5,741 |  |  |  | 5,741 |  |  |  | 10,896 |  |  |
Impaired Loans [Member] | Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 0 |  |  |  | 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 |  |  |  | 0 |  |  |
Impaired Loans [Member] | Commercial Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 5,741 |  |  |  | 5,741 |  |  |  | 10,896 |  |  |
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total Losses | 314 |  | 4,153 |  | 1,746 |  | 1,997 |  | 4,049 |  | 4,069 |
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 32,095 |  |  |  | 32,095 |  |  |  | 15,320 |  |  |
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 |  |  |  | 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 |  |  |  | 0 |  |  |
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 32,095 |  |  |  | 32,095 |  |  |  | 15,320 |  |  |
Impaired Loans [Member] | Residential Mortgage and Equity Lines [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total Losses | 0 |  | 0 |  | 59 |  | 59 |  | 59 |  | 0 |
Impaired Loans [Member] | Residential Mortgage and Equity Lines [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 222 |  |  |  | 222 |  |  |  | 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 |  |  |  | 0 |  |  |  | 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 |  |  |  | 0 |  |  |  | 0 |  |  |
Impaired Loans [Member] | Residential Mortgage and Equity Lines [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 222 |  |  |  | 222 |  |  |  | 243 |  |  |
Other Real Estate Owned [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total Losses | 0 | [1] | 0 | [1] | 0 | [1] | 0 | [1] | 0 | [2] | 0 | [2]
Other Real Estate Owned [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 34,746 | [1] |  |  | 34,746 | [1] |  |  | 24,126 | [2] |  |
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 0 | [1] |  |  | 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 | [1] |  |  | 0 | [2] |  |
Other Real Estate Owned [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 34,746 | [1] |  |  | 34,746 | [1] |  |  | 24,126 | [2] |  |
Other Equity Securities [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total Losses | 0 |  | 0 |  | 0 |  | 0 |  | 0 |  | 0 |
Other Equity Securities [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 1,539 |  |  |  | 1,539 |  |  |  | 1,539 |  |  |
Other Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 0 |  |  |  | 0 |  |  |  | 0 |  |  |
Other Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 0 |  |  |  | 0 |  |  |  | 0 |  |  |
Other Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 1,539 |  |  |  | 1,539 |  |  |  | 1,539 |  |  |
Investments in Venture Capital [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total Losses | 0 |  | $ 0 |  | 0 |  | $ 0 |  | 147 |  | $ 227 |
Investments in Venture Capital [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 84 |  |  |  | 84 |  |  |  | 86 |  |  |
Investments in Venture Capital [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 0 |  |  |  | 0 |  |  |  | 0 |  |  |
Investments in Venture Capital [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 0 |  |  |  | 0 |  |  |  | 0 |  |  |
Investments in Venture Capital [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | $ 84 |  |  |  | $ 84 |  |  |  | $ 86 |  |  |
[1] | Other real estate owned balance of $33.0 million in the Consolidated Balance Sheets is net of estimated disposal costs.
[2] | Other real estate owned balance of $23.1 million in the Consolidated Balance Sheets is net of estimated disposal costs.

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