Note 3 - Loans and Allowance for Credit Losses - Financial Effect by Type of Modification (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)
Contractual Interest Rate Reduction [Member]
Modified in period	$ 0
Contractual Interest Rate Reduction [Member] | Commercial Portfolio Segment [Member]
Modified in period	0
Contractual Interest Rate Reduction [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Modified in period	0
Contractual Interest Rate Reduction [Member] | Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Modified in period	0
Contractual Interest Rate Reduction [Member] | Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Modified in period	0
Contractual Interest Rate Reduction [Member] | Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Modified in period	0
Contractual Interest Rate Reduction [Member] | Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Modified in period	0
Contractual Interest Rate Reduction [Member] | Retail Portfolio Segment [Member]
Modified in period	0
Contractual Interest Rate Reduction [Member] | Retail Portfolio Segment [Member] | Loans Categorized as 1-4 Family Mortgages [Member]
Modified in period	0
Contractual Interest Rate Reduction [Member] | Retail Portfolio Segment [Member] | Other Consumer Loans [Member]
Modified in period	0
Extended Maturity [Member]
Modified in period	500
Extended Maturity [Member] | Commercial Portfolio Segment [Member]
Modified in period	500
Extended Maturity [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Modified in period	500
Extended Maturity [Member] | Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Modified in period	0
Extended Maturity [Member] | Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Modified in period	0
Extended Maturity [Member] | Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Modified in period	0
Extended Maturity [Member] | Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Modified in period	0
Extended Maturity [Member] | Retail Portfolio Segment [Member]
Modified in period	0
Extended Maturity [Member] | Retail Portfolio Segment [Member] | Loans Categorized as 1-4 Family Mortgages [Member]
Modified in period	0
Extended Maturity [Member] | Retail Portfolio Segment [Member] | Other Consumer Loans [Member]
Modified in period	0
Principal Forgiveness [Member]
Modified in period	0
Principal Forgiveness [Member] | Commercial Portfolio Segment [Member]
Modified in period	0
Principal Forgiveness [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Modified in period	0
Principal Forgiveness [Member] | Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member]
Modified in period	0
Principal Forgiveness [Member] | Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member]
Modified in period	0
Principal Forgiveness [Member] | Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member]
Modified in period	0
Principal Forgiveness [Member] | Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member]
Modified in period	0
Principal Forgiveness [Member] | Retail Portfolio Segment [Member]
Modified in period	0
Principal Forgiveness [Member] | Retail Portfolio Segment [Member] | Loans Categorized as 1-4 Family Mortgages [Member]
Modified in period	0
Principal Forgiveness [Member] | Retail Portfolio Segment [Member] | Other Consumer Loans [Member]
Modified in period	$ 0