Note 5 - Derivative and Other Hedging Instruments - Schedule of Fair Value of Derivative Instruments (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
		Mar. 31, 2024	Dec. 31, 2023
Payer Swaptions [Member] | Long [Member]
Cost		$ 1,619	$ 1,619
Fair Value		$ 14	$ 72
Weighted average months to expiration (Year)		2 years	5 years
Notional amount		$ 800,000	$ 800,000
Average fixed pay rate		5.40%	5.40%
Weighted average term (Year)		1 year	1 year
Dual Digital Option [Member]
Fair Value	[1]	$ 261
Weighted average months to expiration (Year)	[1]	5 years 8 months 12 days
Notional amount	[1]	$ 9,412
Cost	[1]	$ 500

[1] If, on September, 20, 2024, the S&P 500 Index (SPX) is lower than 4,725.166, and the SOFR 10 Year Swap Rate is above 3.883%, the Company will receive the notional amount. If either condition is not met, the Company will receive $0.