Note 13 - Loan Commitments and Other Off-balance-sheet Activities (Details Textual) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($)
Commitments To Extend Credit, Duration Of Extension (Day)	60 days
Commitments to Extend Credit [Member]
Notional Or Contractual Credit, Extension Commitments, Fixed Interest Rate Loan	$ 14.1
Commitments to Extend Credit [Member] | Minimum [Member]
Notional Or Contractual Credit Extension Commitments, Fixed Interest Rate	2.65%
Notional Or Contractual Credit Extension Commitments, Loan Maturity (Month)	20 months
Commitments to Extend Credit [Member] | Maximum [Member]
Notional Or Contractual Credit Extension Commitments, Fixed Interest Rate	6.50%
Notional Or Contractual Credit Extension Commitments, Loan Maturity (Month)	5 years