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Note 3 - Loans and Allowance for Credit Losses - Allowance for Loan Losses (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Balance at beginning of period $ 23,514 $ 23,854 $ 19,484
(Reversal) provision 6 2 4,307
Chargeoffs (6,225) (3,248) (4,199)
Recoveries 2,989 2,906 2,245
Total allowance for credit losses 20,284 23,514 23,854
Cumulative Effect, Period of Adoption, Adjustment [Member]      
Balance at beginning of period     2,017
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]      
Balance at beginning of period     21,501
Commercial Portfolio Segment [Member]      
Balance at beginning of period 6,966 9,205 4,959
(Reversal) provision (1,184) (2,411) 746
Chargeoffs (20) (56) (236)
Recoveries 376 228 351
Total allowance for credit losses 6,138 6,966 9,205
Commercial Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]      
Balance at beginning of period     3,385
Commercial Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]      
Balance at beginning of period     8,344
Commercial Real Estate Portfolio Segment [Member]      
Balance at beginning of period 6,529 5,660 4,064
(Reversal) provision (703) 126 929
Recoveries 62 743 49
Total allowance for credit losses 5,888 6,529 5,660
Commercial Real Estate Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]      
Balance at beginning of period     618
Commercial Real Estate Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]      
Balance at beginning of period     4,682
Construction Portfolio Segment [Member]      
Balance at beginning of period 2 6 109
(Reversal) provision 148 (4) (72)
Total allowance for credit losses 150 2 6
Construction Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]      
Balance at beginning of period     (31)
Construction Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]      
Balance at beginning of period     78
Residential Portfolio Segment [Member]      
Balance at beginning of period 45 47 206
(Reversal) provision (13) (2) (27)
Total allowance for credit losses 32 45 47
Residential Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]      
Balance at beginning of period     (132)
Residential Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]      
Balance at beginning of period     74
Consumer Portfolio Segment [Member]      
Balance at beginning of period 9,972 8,936 6,445
(Reversal) provision 1,758 2,293 2,731
Chargeoffs (6,205) (3,192) (3,963)
Recoveries 2,551 1,935 1,845
Total allowance for credit losses $ 8,076 $ 9,972 8,936
Consumer Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]      
Balance at beginning of period     1,878
Consumer Portfolio Segment [Member] | Cumulative Effect, Period of Adoption, Adjusted Balance [Member]      
Balance at beginning of period     8,323
Unallocated Financing Receivable [Member]      
Balance at beginning of period     3,701
Unallocated Financing Receivable [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]      
Balance at beginning of period     $ (3,701)