Note 9 - Loans - Impaired Loans and Related Allowance for Credit Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Loans with no related allowance, unpaid principal balance	$ 29,911	$ 46,336
Loans with no related allowance, recorded investment	23,259	38,401
Loans with related allowance, unpaid principal balance	58,379	38,272
Loans with related allowance, recorded investment	44,866	27,445
Allowance	6,198	4,547
Unpaid principal balance	88,290	84,608
Recorded investment	68,125	65,846
Commercial Portfolio Segment [Member]
Loans with no related allowance, unpaid principal balance	10,171	15,879
Loans with no related allowance, recorded investment	6,887	11,342
Loans with related allowance, unpaid principal balance	32,426	14,294
Loans with related allowance, recorded investment	19,717	5,217
Allowance	4,013	894
Commercial Real Estate Portfolio Segment [Member]
Loans with no related allowance, unpaid principal balance	14,148	24,437
Loans with no related allowance, recorded investment	10,956	21,209
Loans with related allowance, unpaid principal balance	16,002	17,930
Loans with related allowance, recorded investment	15,955	16,964
Allowance	2,146	3,631
Residential Mortgage and Equity Lines Portfolio Segment [Member]
Loans with no related allowance, unpaid principal balance	5,582	6,020
Loans with no related allowance, recorded investment	5,407	5,850
Loans with related allowance, unpaid principal balance	9,951	6,048
Loans with related allowance, recorded investment	9,194	5,264
Allowance	39	$ 22
Installment and Other Loans [Member ]
Loans with no related allowance, unpaid principal balance	10
Loans with no related allowance, recorded investment	$ 9