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Note 3 - Loans and Allowance for Loan Losses - Summary of PCI Loans (Details) - USD ($)
Jun. 30, 2022
Dec. 31, 2021
Carrying amount $ 271,000 $ 281,000
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Allowance for Loan Losses 10,000 31,000
Carrying amount, net of allowance 261,000 250,000
Residential Mortgage Segment [Member] | Residential Loan [Member]    
Carrying amount 268,000 270,000
Residential Mortgage Segment [Member] | Commercial Real Estate Loan [Member]    
Carrying amount $ 3,000 $ 11,000