Note 4 - DERIVATIVES AND HEDGING ACTIVITIES - Hedged Interest Rate Swaps and Non-hedged Interest Rate Swaps (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Derivative [Line Items]
Swapped loan portfolio loan-to-value percentage, including the potential swap exposure	65.00%
Interest rate swap
Derivative [Line Items]
Interest rate swaps collateralized by investment securities	$ 11,602	$ 38,756
Interest rate swap | Cash
Derivative [Line Items]
Interest rate swaps collateralized by investment securities	1,661	1,272
Interest rate swap | Municipal securities
Derivative [Line Items]
Interest rate swaps collateralized by investment securities	3,954	8,227
Interest rate swap | Residential mortgage-backed and related securities
Derivative [Line Items]
Interest rate swaps collateralized by investment securities	$ 5,987	$ 29,257