Note 7 - Loans and Allowance for Credit Losses on Loans - Age Analysis of Modified Loans (Details) $ in Thousands	Dec. 31, 2023 USD ($)
Amortized cost basis of modified loans	$ 11,007
Financial Asset, Not Past Due [Member]
Amortized cost basis of modified loans	11,007
Financial Asset, 30 to 59 Days Past Due [Member]
Amortized cost basis of modified loans	0
Financial Asset, 60 to 89 Days Past Due [Member]
Amortized cost basis of modified loans	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Amortized cost basis of modified loans	0
Commercial Loan [Member]
Amortized cost basis of modified loans	307
Commercial Loan [Member] | Financial Asset, Not Past Due [Member]
Amortized cost basis of modified loans	307
Commercial Loan [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Amortized cost basis of modified loans	0
Commercial Loan [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Amortized cost basis of modified loans	0
Commercial Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Amortized cost basis of modified loans	0
Commercial Real Estate Owner Occupied, Other [Member]
Amortized cost basis of modified loans	35
Commercial Real Estate Owner Occupied, Other [Member] | Financial Asset, Not Past Due [Member]
Amortized cost basis of modified loans	35
Commercial Real Estate Owner Occupied, Other [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Amortized cost basis of modified loans	0
Commercial Real Estate Owner Occupied, Other [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Amortized cost basis of modified loans	0
Commercial Real Estate Owner Occupied, Other [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Amortized cost basis of modified loans	0
Multifamily [Member]
Amortized cost basis of modified loans	9,760
Multifamily [Member] | Financial Asset, Not Past Due [Member]
Amortized cost basis of modified loans	9,760
Multifamily [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Amortized cost basis of modified loans	0
Multifamily [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Amortized cost basis of modified loans	0
Multifamily [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Amortized cost basis of modified loans	0
Commercial Real Estate Nonowner Occupied, Retail [Member]
Amortized cost basis of modified loans	387
Commercial Real Estate Nonowner Occupied, Retail [Member] | Financial Asset, Not Past Due [Member]
Amortized cost basis of modified loans	387
Commercial Real Estate Nonowner Occupied, Retail [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Amortized cost basis of modified loans	0
Commercial Real Estate Nonowner Occupied, Retail [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Amortized cost basis of modified loans	0
Commercial Real Estate Nonowner Occupied, Retail [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Amortized cost basis of modified loans	0
Residential 1-4 Family Real Estate, Personal Residence [Member]
Amortized cost basis of modified loans	173
Residential 1-4 Family Real Estate, Personal Residence [Member] | Financial Asset, Not Past Due [Member]
Amortized cost basis of modified loans	173
Residential 1-4 Family Real Estate, Personal Residence [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Amortized cost basis of modified loans	0
Residential 1-4 Family Real Estate, Personal Residence [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Amortized cost basis of modified loans	0
Residential 1-4 Family Real Estate, Personal Residence [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Amortized cost basis of modified loans	0
Residential 1-4 Family Real Estate, Rental Small Loan [Member]
Amortized cost basis of modified loans	345
Residential 1-4 Family Real Estate, Rental Small Loan [Member] | Financial Asset, Not Past Due [Member]
Amortized cost basis of modified loans	345
Residential 1-4 Family Real Estate, Rental Small Loan [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Amortized cost basis of modified loans	0
Residential 1-4 Family Real Estate, Rental Small Loan [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Amortized cost basis of modified loans	0
Residential 1-4 Family Real Estate, Rental Small Loan [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Amortized cost basis of modified loans	$ 0