Note 9 - Loans - Accruing Troubled Debt Restructurings (Details) - Accruing Troubled Debt Restructuring [Member] - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Accruing TDRs	$ 12,994	$ 12,837
Payment Deferral [Member]
Accruing TDRs	5,058	5,270
Contractual Interest Rate Reduction [Member]
Accruing TDRs	5,725	5,771
Rate Reduction and Payment Deferral [Member]
Accruing TDRs	2,211	1,796
Commercial Portfolio Segment [Member]
Accruing TDRs	3,262	3,368
Commercial Portfolio Segment [Member] | Payment Deferral [Member]
Accruing TDRs	3,262	3,368
Commercial Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member]
Accruing TDRs	0	0
Commercial Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member]
Accruing TDRs	0	0
Commercial Real Estate Portfolio Segment [Member]
Accruing TDRs	6,094	6,128
Commercial Real Estate Portfolio Segment [Member] | Payment Deferral [Member]
Accruing TDRs	0	438
Commercial Real Estate Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member]
Accruing TDRs	5,490	5,522
Commercial Real Estate Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member]
Accruing TDRs	604	168
Residential Portfolio Segment [Member]
Accruing TDRs	3,638	3,341
Residential Portfolio Segment [Member] | Payment Deferral [Member]
Accruing TDRs	1,796	1,464
Residential Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member]
Accruing TDRs	235	249
Residential Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member]
Accruing TDRs	$ 1,607	$ 1,628