Note 2 - Loans and Allowance for Credit Losses - Modified Financing Receivables (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)
Financial Asset, 30 to 59 Days Past Due [Member]
Modified loans	$ 0	$ 0
Financial Asset, 60 to 89 Days Past Due [Member]
Modified loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Modified loans	0	0
Financial Asset, Past Due [Member]
Modified loans	$ 0	$ 0
Loans Receivable [Member]
Percentage of financing receivables		0.10%
Weighted average interest rate reduction	0.00%	0.00%
Weighted average term extension (Month)		37 months
Payment Deferral [Member] | Loans Receivable [Member]
Financing receivable, modification amount		$ 3,383
Modified loans	$ 0	0
Principal Forgiveness [Member] | Loans Receivable [Member]
Financing receivable, modification amount		0
Modified loans	0	0
Extended Maturity [Member] | Loans Receivable [Member]
Financing receivable, modification amount		97
Modified loans	0	0
Contractual Interest Rate Reduction [Member] | Loans Receivable [Member]
Financing receivable, modification amount		0
Modified loans	0	0
Extended Maturity and Principal Forgiveness [Member] | Loans Receivable [Member]
Financing receivable, modification amount		0
Extended Maturity and Interest Rate Reduction [Member] | Loans Receivable [Member]
Financing receivable, modification amount		0
Real Estate Portfolio Segment [Member] | Residential 1 to 4 Family [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Modified loans	0	0
Real Estate Portfolio Segment [Member] | Residential 1 to 4 Family [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Modified loans	0	0
Real Estate Portfolio Segment [Member] | Residential 1 to 4 Family [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Modified loans	0	0
Real Estate Portfolio Segment [Member] | Residential 1 to 4 Family [Member] | Financial Asset, Past Due [Member]
Modified loans	$ 0	$ 0
Real Estate Portfolio Segment [Member] | Residential 1 to 4 Family [Member] | Loans Receivable [Member]
Percentage of financing receivables		0.11%
Weighted average interest rate reduction	0.00%	0.00%
Real Estate Portfolio Segment [Member] | Residential 1 to 4 Family [Member] | Payment Deferral [Member] | Loans Receivable [Member]
Financing receivable, modification amount		$ 947
Modified loans	$ 0	0
Real Estate Portfolio Segment [Member] | Residential 1 to 4 Family [Member] | Principal Forgiveness [Member] | Loans Receivable [Member]
Modified loans	0	0
Real Estate Portfolio Segment [Member] | Residential 1 to 4 Family [Member] | Extended Maturity [Member] | Loans Receivable [Member]
Modified loans	0	0
Real Estate Portfolio Segment [Member] | Residential 1 to 4 Family [Member] | Contractual Interest Rate Reduction [Member] | Loans Receivable [Member]
Modified loans	0	0
Real Estate Portfolio Segment [Member] | Commercial and Multifamily [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Modified loans	0	0
Real Estate Portfolio Segment [Member] | Commercial and Multifamily [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Modified loans	0	0
Real Estate Portfolio Segment [Member] | Commercial and Multifamily [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Modified loans	0	0
Real Estate Portfolio Segment [Member] | Commercial and Multifamily [Member] | Financial Asset, Past Due [Member]
Modified loans	$ 0	$ 0
Real Estate Portfolio Segment [Member] | Commercial and Multifamily [Member] | Loans Receivable [Member]
Percentage of financing receivables		0.21%
Weighted average interest rate reduction	0.00%	0.00%
Real Estate Portfolio Segment [Member] | Commercial and Multifamily [Member] | Payment Deferral [Member] | Loans Receivable [Member]
Financing receivable, modification amount		$ 2,436
Modified loans	$ 0	0
Real Estate Portfolio Segment [Member] | Commercial and Multifamily [Member] | Principal Forgiveness [Member] | Loans Receivable [Member]
Financing receivable, modification amount		0
Modified loans	0	0
Real Estate Portfolio Segment [Member] | Commercial and Multifamily [Member] | Extended Maturity [Member] | Loans Receivable [Member]
Financing receivable, modification amount		0
Modified loans	0	0
Real Estate Portfolio Segment [Member] | Commercial and Multifamily [Member] | Contractual Interest Rate Reduction [Member] | Loans Receivable [Member]
Financing receivable, modification amount		0
Modified loans	0	0
Real Estate Portfolio Segment [Member] | Commercial and Multifamily [Member] | Extended Maturity and Principal Forgiveness [Member] | Loans Receivable [Member]
Financing receivable, modification amount		0
Real Estate Portfolio Segment [Member] | Commercial and Multifamily [Member] | Extended Maturity and Interest Rate Reduction [Member] | Loans Receivable [Member]
Financing receivable, modification amount		0
Real Estate Portfolio Segment [Member] | Construction, Land Development and Farmland [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Modified loans	0	0
Real Estate Portfolio Segment [Member] | Construction, Land Development and Farmland [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Modified loans	0	0
Real Estate Portfolio Segment [Member] | Construction, Land Development and Farmland [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Modified loans	0	0
Real Estate Portfolio Segment [Member] | Construction, Land Development and Farmland [Member] | Financial Asset, Past Due [Member]
Modified loans	$ 0	$ 0
Real Estate Portfolio Segment [Member] | Construction, Land Development and Farmland [Member] | Loans Receivable [Member]
Percentage of financing receivables		0.00%
Weighted average interest rate reduction	0.00%	0.00%
Real Estate Portfolio Segment [Member] | Construction, Land Development and Farmland [Member] | Payment Deferral [Member] | Loans Receivable [Member]
Financing receivable, modification amount		$ 0
Modified loans	$ 0	0
Real Estate Portfolio Segment [Member] | Construction, Land Development and Farmland [Member] | Principal Forgiveness [Member] | Loans Receivable [Member]
Financing receivable, modification amount		0
Modified loans	0	0
Real Estate Portfolio Segment [Member] | Construction, Land Development and Farmland [Member] | Extended Maturity [Member] | Loans Receivable [Member]
Financing receivable, modification amount		0
Modified loans	0	0
Real Estate Portfolio Segment [Member] | Construction, Land Development and Farmland [Member] | Contractual Interest Rate Reduction [Member] | Loans Receivable [Member]
Financing receivable, modification amount		0
Modified loans	0	0
Real Estate Portfolio Segment [Member] | Construction, Land Development and Farmland [Member] | Extended Maturity and Principal Forgiveness [Member] | Loans Receivable [Member]
Financing receivable, modification amount		0
Real Estate Portfolio Segment [Member] | Construction, Land Development and Farmland [Member] | Extended Maturity and Interest Rate Reduction [Member] | Loans Receivable [Member]
Financing receivable, modification amount		0
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Modified loans	0	0
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Modified loans	0	0
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Modified loans	0	0
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] | Financial Asset, Past Due [Member]
Modified loans	$ 0	$ 0
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] | Loans Receivable [Member]
Percentage of financing receivables		0.00%
Weighted average interest rate reduction	0.00%	0.00%
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] | Payment Deferral [Member] | Loans Receivable [Member]
Financing receivable, modification amount		$ 0
Modified loans	$ 0	0
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] | Principal Forgiveness [Member] | Loans Receivable [Member]
Financing receivable, modification amount		0
Modified loans	0	0
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] | Extended Maturity [Member] | Loans Receivable [Member]
Financing receivable, modification amount		0
Modified loans	0	0
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] | Contractual Interest Rate Reduction [Member] | Loans Receivable [Member]
Financing receivable, modification amount		0
Modified loans	0	0
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] | Extended Maturity and Principal Forgiveness [Member] | Loans Receivable [Member]
Financing receivable, modification amount		0
Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] | Extended Maturity and Interest Rate Reduction [Member] | Loans Receivable [Member]
Financing receivable, modification amount		0
Commercial, Industrial and Agricultural Portfolio [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Modified loans	0	0
Commercial, Industrial and Agricultural Portfolio [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Modified loans	0	0
Commercial, Industrial and Agricultural Portfolio [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Modified loans	0	0
Commercial, Industrial and Agricultural Portfolio [Member] | Financial Asset, Past Due [Member]
Modified loans	$ 0	$ 0
Commercial, Industrial and Agricultural Portfolio [Member] | Loans Receivable [Member]
Percentage of financing receivables		0.08%
Weighted average interest rate reduction	0.00%	0.00%
Weighted average term extension (Month)		37 months
Commercial, Industrial and Agricultural Portfolio [Member] | Payment Deferral [Member] | Loans Receivable [Member]
Financing receivable, modification amount		$ 0
Modified loans	$ 0	0
Commercial, Industrial and Agricultural Portfolio [Member] | Principal Forgiveness [Member] | Loans Receivable [Member]
Financing receivable, modification amount		0
Modified loans	0	0
Commercial, Industrial and Agricultural Portfolio [Member] | Extended Maturity [Member] | Loans Receivable [Member]
Financing receivable, modification amount		97
Modified loans	0	0
Commercial, Industrial and Agricultural Portfolio [Member] | Contractual Interest Rate Reduction [Member] | Loans Receivable [Member]
Financing receivable, modification amount		0
Modified loans	0	0
Commercial, Industrial and Agricultural Portfolio [Member] | Extended Maturity and Principal Forgiveness [Member] | Loans Receivable [Member]
Financing receivable, modification amount		0
Commercial, Industrial and Agricultural Portfolio [Member] | Extended Maturity and Interest Rate Reduction [Member] | Loans Receivable [Member]
Financing receivable, modification amount		0
Consumer Portfolio Segment [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Modified loans	0	0
Consumer Portfolio Segment [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Modified loans	0	0
Consumer Portfolio Segment [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Modified loans	0	0
Consumer Portfolio Segment [Member] | Financial Asset, Past Due [Member]
Modified loans	$ 0	$ 0
Consumer Portfolio Segment [Member] | Loans Receivable [Member]
Percentage of financing receivables		0.00%
Weighted average interest rate reduction	0.00%	0.00%
Consumer Portfolio Segment [Member] | Payment Deferral [Member] | Loans Receivable [Member]
Financing receivable, modification amount		$ 0
Modified loans	$ 0	0
Consumer Portfolio Segment [Member] | Principal Forgiveness [Member] | Loans Receivable [Member]
Financing receivable, modification amount		0
Modified loans	0	0
Consumer Portfolio Segment [Member] | Extended Maturity [Member] | Loans Receivable [Member]
Financing receivable, modification amount		0
Modified loans	0	0
Consumer Portfolio Segment [Member] | Contractual Interest Rate Reduction [Member] | Loans Receivable [Member]
Financing receivable, modification amount		0
Modified loans	$ 0	0
Consumer Portfolio Segment [Member] | Extended Maturity and Principal Forgiveness [Member] | Loans Receivable [Member]
Financing receivable, modification amount		0
Consumer Portfolio Segment [Member] | Extended Maturity and Interest Rate Reduction [Member] | Loans Receivable [Member]
Financing receivable, modification amount		$ 0