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Note 2 - Debt Securities - Securities by Contractual Maturity (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Jan. 01, 2021
[2]
Securities available for sale, due within one year, amortized cost $ 17,872    
Securities available for sale, due within one year, fair value 17,787    
Securities available for sale, due after one year but within five years, amortized cost 153,894    
Securities available for sale, due after one year but within five years, fair value 152,562    
Securities available for sale, due after five years but within ten years, amortized cost 9,757    
Securities available for sale, due after five years but within ten years, fair value 9,690    
Securities available for sale, single maturity date, amortized cost 181,523    
Securities available for sale, single maturity date, fair value (US 180,039    
Securities available for sale, amortized cost 274,580 $ 76,273  
Securities available for sale, fair value 268,703 $ 76,292 [1] $ 83,358
Collateralized Mortgage-Backed Securities [Member]      
Mortgage-backed Agency securities, amortized cost 93,057    
Mortgage-backed Agency securities, fair value $ 88,664    
[1] Derived from audited financial statements
[2] Per our analysis no ACL was necessary for investment securities available for sale.