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Note 8 - Loans - Troubled Debt Restructuring Activity (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Charge-offs | $ 0 | $ 0 | $ 0 | $ 0
Accruing Troubled Debt Restructuring [Member] |  |  |  |
Beginning balance | 27,261 | 31,671 | 27,721 | 35,336
New restructurings | (208) | 2,983 | 479 | 5,417
Restructured loans restored to accrual status | 0 | 263 | 0 | 263
Charge-offs | 0 | 0 | 0 | 0
Payments | (2,406) | (6,330) | (3,553) | (12,429)
Restructured loans placed on non-accrual status | (241) | 0 | (241) | 0
Ending balance | 24,406 | 28,587 | 24,406 | 28,587
Non-accruing Troubled Debt Restructuring [Member] |  |  |  |
Beginning balance | 8,402 | 12,670 | 8,985 | 18,048
New restructurings | 0 | 0 | 0 | 0
Restructured loans restored to accrual status | 234 | 0 | 241 | 0
Charge-offs | 0 | 0 | 0 | (4,970)
Payments | (352) | (2,488) | (710) | (2,896)
Restructured loans placed on non-accrual status | 0 | (263) | (232) | (263)
Ending balance | $ 8,284 | $ 9,919 | $ 8,284 | $ 9,919

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