Note 9 - Derivatives and Hedging Activities (Details Textual) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Noninterest Expense	$ 28,599,000	$ 25,742,000
Noninterest Income, Total	6,951,000	$ 9,277,000
Interest Rate Swap [Member]
Noninterest Expense	200,000
Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral	23,300,000		$ 25,900,000
Derivative Liability, Subject to Master Netting Arrangement, Asset Offset	19,600,000		25,300,000
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset	20,800,000		25,200,000
Derivative Asset, Subject to Master Netting Arrangement, before Offset	1,200,000		100,000
Derivative Liability, Subject to Master Netting Arrangement, after Offset	3,300,000		400,000
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset	3,000,000.0		400,000
Derivative Liability, Subject to Master Netting Arrangement, after Offset and Deduction	300,000		0
Derivative, Notional Amount	$ 470,678,000		401,572,000
Noninterest Income, Total			$ 100,000