Note 9 - Loans - Impaired Loans and Related Allowance for Credit Losses (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Loans with no related allowance, unpaid principal balance	$ 38,016	$ 46,336
Loans with no related allowance, recorded investment	31,262	38,401
Loans with related allowance, unpaid principal balance	39,436	38,272
Loans with related allowance, recorded investment	29,390	27,445
Allowance	6,984	4,547
Unpaid principal balance	77,452	84,608
Recorded investment	60,652	65,846
Commercial Portfolio Segment [Member]
Loans with no related allowance, unpaid principal balance	12,349	15,879
Loans with no related allowance, recorded investment	8,934	11,342
Loans with related allowance, unpaid principal balance	28,268	14,294
Loans with related allowance, recorded investment	18,916	5,217
Allowance	6,813	894
Commercial Real Estate Portfolio Segment [Member]
Loans with no related allowance, unpaid principal balance	15,884	24,437
Loans with no related allowance, recorded investment	12,756	21,209
Loans with related allowance, unpaid principal balance	2,426	17,930
Loans with related allowance, recorded investment	2,384	16,964
Allowance	133	3,631
Residential Mortgage and Equity Lines Portfolio Segment [Member]
Loans with no related allowance, unpaid principal balance	9,704	6,020
Loans with no related allowance, recorded investment	9,493	5,850
Loans with related allowance, unpaid principal balance	8,742	6,048
Loans with related allowance, recorded investment	8,090	5,264
Allowance	38	$ 22
Installment and Other Loans [Member ]
Loans with no related allowance, unpaid principal balance	79
Loans with no related allowance, recorded investment	79
Loans with related allowance, unpaid principal balance	0
Loans with related allowance, recorded investment	$ 0