Note 18 - Schedule of Derivative Designated as Fair Value Hedging Instruments of Statements on Income (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
Total	$ 19,257	$ 18,497	$ 15,865	$ 15,463	$ 14,739	$ 13,546	$ 12,327	$ 11,809	$ 69,082	$ 52,421	$ 46,770
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Total									2,801
Designated as Hedging Instrument [Member] | State and Municipal Securities [Member]
Derivative [Line Items]
Recognized on fair value hedge									2,180
Recognized on hedge portfolio									(1,470)
Recognized on remeasurement of fair value hedge									16
Designated as Hedging Instrument [Member] | U.S. Government agencies and GSE mortgage backed securities
Derivative [Line Items]
Recognized on fair value hedge									6,517
Recognized on hedge portfolio									(4,483)
Recognized on remeasurement of fair value hedge									$ 41