Note 16 - Off-balance Sheet Activities (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Fair Value Disclosure, Off-balance Sheet Risks, Loan Repurchase Requirement Number of Days Past Due (Day)	90 days
Fair Value Disclosure, Off-balance Sheet Risks, Loan Repurchase Requirement, Number of Days Following Sale (Day)	180 days
Mortgage Loan Rate Lock Commitments [Member]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	$ 10,891,000	$ 26,883,000
Loans Held for Sale [Member]
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Liability	$ 8,481,000