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Note 12 - Fair Value Measurements and Fair Value of Financial Instruments - Financial Assets and Liabilities Measured on a Non-recurring Basis (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023 | Dec. 31, 2022
Total Losses | $ 3,728 |  | $ 252 |  | $ 5,017 |  | $ 4,069 |  | $ 4,296 |  | $ 4,145 |
Other real estate owned, net | 18,277 |  |  |  | 18,277 |  |  |  | 19,441 |  |  |
Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 44,404 |  |  |  | 44,404 |  |  |  | 27,756 |  |  |
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 | 44,404 |  |  |  | 44,404 |  |  |  | 27,756 |  |  |
Impaired Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total Losses | 3,728 |  | 252 |  | 5,017 |  | 4,069 |  | 4,069 |  | 3,877 |
Impaired Loans [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 23,466 |  |  |  | 23,466 |  |  |  | 7,073 |  |  |
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 | 23,466 |  |  |  | 23,466 |  |  |  | 7,073 |  |  |
Impaired Loans [Member] | Commercial Portfolio Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total Losses | 1,923 |  | 0 |  | 2,961 |  | 0 |  | 0 |  | 1,786 |
Impaired Loans [Member] | Commercial Portfolio Segment [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 5,732 |  |  |  | 5,732 |  |  |  | 191 |  |  |
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 | 5,732 |  |  |  | 5,732 |  |  |  | 191 |  |  |
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total Losses | 1,746 |  | 252 |  | 1,997 |  | 4,069 |  | 4,069 |  | 2,091 |
Impaired Loans [Member] | Commercial Real Estate Portfolio Segment [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 17,485 |  |  |  | 17,485 |  |  |  | 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 |  |  |  | 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 | 17,485 |  |  |  | 17,485 |  |  |  | 6,882 |  |  |
Impaired Loans [Member] | Residential Portfolio Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total Losses | 59 |  | 0 |  | 59 |  | 0 |  |  |  |  |
Impaired Loans [Member] | Residential Portfolio Segment [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 249 |  |  |  | 249 |  |  |  |  |  |  |
Impaired Loans [Member] | Residential Portfolio Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 0 |  |  |  | 0 |  |  |  |  |  |  |
Impaired Loans [Member] | Residential Portfolio Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 0 |  |  |  | 0 |  |  |  |  |  |  |
Impaired Loans [Member] | Residential Portfolio Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 249 |  |  |  | 249 |  |  |  |  |  |  |
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 | 19,306 | [1] |  |  | 19,306 | [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 | [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 | 19,306 | [1] |  |  | 19,306 | [1] |  |  | 20,446 | [2] |  |
Investments in Venture Capital [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total Losses | 0 |  | 0 |  | 0 |  | 0 |  | 227 |  | $ 268 |
Investments in Venture Capital [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 93 |  |  |  | 93 |  |  |  | 237 |  |  |
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 | 93 |  |  |  | 93 |  |  |  | $ 237 |  |  |
Other Equity Securities [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total Losses | 0 |  | $ 0 |  | 0 |  | $ 0 |  |  |  |  |
Other Equity Securities [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 1,539 |  |  |  | 1,539 |  |  |  |  |  |  |
Other Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 0 |  |  |  | 0 |  |  |  |  |  |  |
Other Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |  |  |  |  |  |  |  |  |  |  |
Total at Fair Value | 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] | Other real estate owned balance of $18.3 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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