Note 9 - Loans - Non-accrual Troubled Debt Restructurings (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Accruing TDRs	$ 126
Contractual Interest Rate Reduction [Member]
Accruing TDRs	0
Rate Reduction and Payment Deferral [Member]
Accruing TDRs	126
Non-accruing Troubled Debt Restructuring [Member]
Accruing TDRs		$ 6,348
Non-accruing Troubled Debt Restructuring [Member] | Payment Deferral [Member]
Accruing TDRs		6,348
Non-accruing Troubled Debt Restructuring [Member] | Contractual Interest Rate Reduction [Member]
Accruing TDRs		0
Non-accruing Troubled Debt Restructuring [Member] | Rate Reduction and Payment Deferral [Member]
Accruing TDRs		0
Commercial Portfolio Segment [Member]
Accruing TDRs	126
Commercial Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member]
Accruing TDRs	0
Commercial Portfolio Segment [Member] | Rate Reduction and Payment Deferral [Member]
Accruing TDRs	$ 126
Commercial Portfolio Segment [Member] | Non-accruing Troubled Debt Restructuring [Member]
Accruing TDRs		3,629
Commercial Portfolio Segment [Member] | Non-accruing Troubled Debt Restructuring [Member] | Payment Deferral [Member]
Accruing TDRs		3,629
Commercial Portfolio Segment [Member] | Non-accruing Troubled Debt Restructuring [Member] | Contractual Interest Rate Reduction [Member]
Accruing TDRs		0
Commercial Portfolio Segment [Member] | Non-accruing Troubled Debt Restructuring [Member] | Rate Reduction and Payment Deferral [Member]
Accruing TDRs		0
Commercial Real Estate Portfolio Segment [Member] | Non-accruing Troubled Debt Restructuring [Member]
Accruing TDRs		1,098
Commercial Real Estate Portfolio Segment [Member] | Non-accruing Troubled Debt Restructuring [Member] | Payment Deferral [Member]
Accruing TDRs		1,098
Commercial Real Estate Portfolio Segment [Member] | Non-accruing Troubled Debt Restructuring [Member] | Contractual Interest Rate Reduction [Member]
Accruing TDRs		0
Commercial Real Estate Portfolio Segment [Member] | Non-accruing Troubled Debt Restructuring [Member] | Rate Reduction and Payment Deferral [Member]
Accruing TDRs		0
Residential Portfolio Segment [Member] | Non-accruing Troubled Debt Restructuring [Member]
Accruing TDRs		1,621
Residential Portfolio Segment [Member] | Non-accruing Troubled Debt Restructuring [Member] | Payment Deferral [Member]
Accruing TDRs		1,621
Residential Portfolio Segment [Member] | Non-accruing Troubled Debt Restructuring [Member] | Contractual Interest Rate Reduction [Member]
Accruing TDRs		0
Residential Portfolio Segment [Member] | Non-accruing Troubled Debt Restructuring [Member] | Rate Reduction and Payment Deferral [Member]
Accruing TDRs		$ 0