Note 9 - Loans - Non-accrual Troubled Debt Restructurings (Details) - Non-accruing Troubled Debt Restructuring [Member] $ in Thousands	Dec. 31, 2022 USD ($)
Accruing TDRs	$ 6,348
Payment Deferral [Member]
Accruing TDRs	6,348
Contractual Interest Rate Reduction [Member]
Accruing TDRs	0
Rate Reduction and Payment Deferral [Member]
Accruing TDRs	0
Commercial Portfolio Segment [Member]
Accruing TDRs	3,629
Commercial Portfolio Segment [Member] | Payment Deferral [Member]
Accruing TDRs	3,629
Commercial Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member]
Accruing TDRs	0
Commercial Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member]
Accruing TDRs	0
Commercial Real Estate Portfolio Segment [Member]
Accruing TDRs	1,098
Commercial Real Estate Portfolio Segment [Member] | Payment Deferral [Member]
Accruing TDRs	1,098
Commercial Real Estate Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member]
Accruing TDRs	0
Commercial Real Estate Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member]
Accruing TDRs	0
Residential Portfolio Segment [Member]
Accruing TDRs	1,621
Residential Portfolio Segment [Member] | Payment Deferral [Member]
Accruing TDRs	1,621
Residential Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member]
Accruing TDRs	0
Residential Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member]
Accruing TDRs	$ 0