Note 4 - Allowance for Loan Losses and Reserve for Unfunded Lending Commitments (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021		Dec. 31, 2020
Loans and Leases Receivable, Allowance, Ending Balance	$ 19,189	$ 20,630	$ 19,189	$ 20,630	$ 18,678	[1]	$ 21,403
Financing Receivable, Credit Loss, Expense (Reversal)	615	$ 482	438	$ (870)	(2,825)
SBA CARES Act Paycheck Protection Program [Member]
Loans and Leases Receivable, Allowance, Ending Balance	$ 0		$ 0		$ 0

[1] Derived from audited consolidated financial statements