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Note 1 - Basis of Presentation - Schedule of Error Corrections and Prior Period Adjustments (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Jun. 30, 2024 | Dec. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | --- | --- | --- | --- | ---
Carrying amount | $ 1,719,060 |  | $ 1,723,471 |  |  | $ 1,401,278
ACL on loans | (11,867) | $ (11,270) | (10,525) | $ (7,932) | $ (7,956) | (5,646)
ACL on debt securities, held to maturity | (7) |  | (5) |  |  | 0
Deferred tax assets, net |  |  |  |  |  | 6,639
ACL on off-balance sheet credit exposures | 340 | 362 | 281 | $ 258 | 381 | 0
Retained earnings | $ 138,325 |  | 140,017 |  |  | 139,249
Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |  |  |  |
ACL on loans |  |  |  |  |  | (2,196)
ACL on off-balance sheet credit exposures |  | $ 0 | $ 0 |  | $ 0 | 571
Cumulative Effect, Period of Adoption, Adjustment [Member] | Accounting Standards Update 2016-13 [Member] |  |  |  |  |  |
Carrying amount |  |  |  |  |  | 341
ACL on loans |  |  |  |  |  | (2,196)
ACL on debt securities, held to maturity |  |  |  |  |  | (7)
Deferred tax assets, net |  |  |  |  |  | 511
ACL on off-balance sheet credit exposures |  |  |  |  |  | 571
Retained earnings |  |  |  |  |  | (1,922)
Cumulative Effect, Period of Adoption, Adjusted Balance [Member] | Accounting Standards Update 2016-13 [Member] |  |  |  |  |  |
Carrying amount |  |  |  |  |  | 1,401,619
ACL on loans |  |  |  |  |  | (7,842)
ACL on debt securities, held to maturity |  |  |  |  |  | (7)
Deferred tax assets, net |  |  |  |  |  | 7,150
ACL on off-balance sheet credit exposures |  |  |  |  |  | 571
Retained earnings |  |  |  |  |  | $ 137,327

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