Note 5 - Derivative and Other Hedging Instruments - Schedule of Fair Value of Derivative Instruments (Details) - Payer Swaptions [Member] - Long [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)
Cost	$ 1,619
Fair Value	$ 72
Weighted average months to expiration (Year)	5 years
Notional amount	$ 800,000
Average fixed pay rate	5.40%
Weighted average term (Year)	1 year