Note 9 - Derivatives and Hedging Activities (Details Textual) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Noninterest Income, Total	$ 9,277,000	$ 13,463,000
Noninterest Expense, Total	25,742,000	$ 25,117,000
Interest Rate Swap [Member]
Noninterest Income, Total	100,000
Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral, Total	10,200,000		$ 4,900,000
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset	10,300,000		3,600,000
Derivative, Notional Amount	$ 338,231,000		279,419,000
Noninterest Expense, Total			$ 200,000