Note 5 - Derivative and Other Hedging Instruments - Schedule of Derivative Instruments in Balance Sheet (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Restricted Cash and Cash Equivalent, Current	$ 3,703	$ 25,723
Other liabilities	(2,138)	(5,395)
Not Designated as Hedging Instrument, Economic Hedge [Member]
Derivative assets, at fair value	6,710	9,277
Derivative liabilities, at fair value	0	332
Total margin balances on derivative contracts	(512)	(1,377)
Not Designated as Hedging Instrument, Economic Hedge [Member] | Interest Rate Swap [Member]
Derivative assets, at fair value	6,267	4,574
Not Designated as Hedging Instrument, Economic Hedge [Member] | TBA Contracts [Member]
Derivative assets, at fair value	443	4,703
Derivative liabilities, at fair value	0	332
Restricted Cash and Cash Equivalent, Current	0	280
Other liabilities	(1,403)	(4,282)
Not Designated as Hedging Instrument, Economic Hedge [Member] | Eurodollar Future Margin [Member]
Restricted Cash and Cash Equivalent, Current	$ 891	$ 2,625