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Note 4 - Loans Receivables and Allowance for Loan and Lease Losses - Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Impaired loans, related allowance	$ 2,300	$ 1,400
Impaired loans, recorded investment	23,800	24,400
With no allowance recorded, average recorded investment	14,900	12,783	$ 19,123
With no allowance recorded, interest income recognized	182	193	279
With allowance recorded, average recorded investment	11,642	8,934	3,572
With allowance recorded, interest income recognized	220	42	415
Impaired Loans, Average recorded investment	26,542	21,717	22,695
Impaired Loans, interest income recognized	402	235	694
Business Activities Loans [Member]
Impaired loans with no related allowance recorded, recorded investment	10,820	15,453
Impaired loans with no related allowance recorded, unpaid principal balance	11,820	16,692
Impaired loans with a related allowance recorded, recorded investment	12,982	8,930
Impaired loans with a related allowance recorded, unpaid principal balance	13,416	8,930
Impaired loans, related allowance	2,299	1,412
Impaired loans, recorded investment	23,802	24,383
Impaired loans, unpaid principal balance	25,236	25,622
Commercial Real Estate Portfolio Segment [Member]
With no allowance recorded, average recorded investment	7,636	5,859	9,829
With no allowance recorded, interest income recognized	103	39	95
With allowance recorded, average recorded investment	8,869	8,861	888
With allowance recorded, interest income recognized	66	35	415
Impaired Loans, Average recorded investment	16,505	14,720	10,717
Impaired Loans, interest income recognized	169	74	510
Commercial Real Estate Portfolio Segment [Member] | Business Activities Loans [Member]
Impaired loans with no related allowance recorded, recorded investment	6,820	5,723
Impaired loans with no related allowance recorded, unpaid principal balance	7,776	6,644
Impaired loans with a related allowance recorded, recorded investment	8,884	8,811
Impaired loans with a related allowance recorded, unpaid principal balance	8,811	8,811
Impaired loans, related allowance	1,567	1,398
Impaired loans, recorded investment	15,704	14,534
Impaired loans, unpaid principal balance	16,587	15,455
Residential Portfolio Segment [Member]
With no allowance recorded, average recorded investment	4,014	3,681	2,531
With no allowance recorded, interest income recognized	51	28	104
With allowance recorded, average recorded investment	428	34	952
With allowance recorded, interest income recognized	21	7	0
Impaired Loans, Average recorded investment	4,442	3,715	3,483
Impaired Loans, interest income recognized	72	35	104
Residential Portfolio Segment [Member] | Business Activities Loans [Member]
Impaired loans with no related allowance recorded, recorded investment	2,847	3,853
Impaired loans with no related allowance recorded, unpaid principal balance	2,763	3,900
Impaired loans with a related allowance recorded, recorded investment	461	109
Impaired loans with a related allowance recorded, unpaid principal balance	488	109
Impaired loans, related allowance	8	4
Impaired loans, recorded investment	3,308	3,962
Impaired loans, unpaid principal balance	3,251	4,009
Commercial Portfolio Segment [Member]
With no allowance recorded, average recorded investment	2,548	2,111	1,800
With no allowance recorded, interest income recognized	12	79	45
With allowance recorded, average recorded investment	2,239	0	1,714
With allowance recorded, interest income recognized	126	0	0
Impaired Loans, Average recorded investment	4,787	2,111	3,514
Impaired Loans, interest income recognized	138	79	45
Commercial Portfolio Segment [Member] | Business Activities Loans [Member]
Impaired loans with no related allowance recorded, recorded investment	630	4,700
Impaired loans with no related allowance recorded, unpaid principal balance	758	4,816
Impaired loans with a related allowance recorded, recorded investment	3,471	0
Impaired loans with a related allowance recorded, unpaid principal balance	3,916	0
Impaired loans, related allowance	723	0
Impaired loans, recorded investment	4,101	4,700
Impaired loans, unpaid principal balance	4,674	4,816
Consumer Portfolio Segment [Member]
With no allowance recorded, average recorded investment	702	1,132	901
With no allowance recorded, interest income recognized	16	47	35
With allowance recorded, average recorded investment	106	39	18
With allowance recorded, interest income recognized	7	0	0
Impaired Loans, Average recorded investment	808	1,171	919
Impaired Loans, interest income recognized	23	47	35
Consumer Portfolio Segment [Member] | Business Activities Loans [Member]
Impaired loans with no related allowance recorded, recorded investment	523	1,177
Impaired loans with no related allowance recorded, unpaid principal balance	523	1,332
Impaired loans with a related allowance recorded, recorded investment	166	10
Impaired loans with a related allowance recorded, unpaid principal balance	201	10
Impaired loans, related allowance	1	10
Impaired loans, recorded investment	689	1,187
Impaired loans, unpaid principal balance	724	1,342
Construction Portfolio Segment [Member]
With no allowance recorded, average recorded investment	0	0	4,062
With no allowance recorded, interest income recognized	0	0	0
Impaired Loans, Average recorded investment	0	0	4,062
Impaired Loans, interest income recognized	$ 0	$ 0	$ 0

X

- Definition

Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

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