Note 13 - Commitments and Contingencies - Financial Instrument Represent Credit Risk (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Commitments to Extend Credit [Member]
Financial instruments, contracts representing credit risk	$ 2,720	$ 1,629
Standby Letters of Credit [Member]
Financial instruments, contracts representing credit risk	212	182
Unfunded Commitments Lines of Credit and Loans [Member]
Financial instruments, contracts representing credit risk	$ 270,273	$ 212,114