Note 14 - Commitments and Contingencies - Financial Instrument Represent Credit Risk (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Commitments to Extend Credit [Member]
Financial instruments, contracts representing credit risk	$ 1,629	$ 101
Standby Letters of Credit [Member]
Financial instruments, contracts representing credit risk	182	182
Unfunded Commitments Lines of Credit and Loans [Member]
Financial instruments, contracts representing credit risk	$ 212,114	$ 88,225