Note 5 - Derivative and Other Hedging Instruments - Schedule of Derivative Instruments in Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Restricted Cash and Cash Equivalent, Current	$ 15,572	$ 25,723
TBA securities (including margin received on unsettled trades)	(4,018)	(5,395)
Not Designated as Hedging Instrument, Economic Hedge [Member]
Derivative assets, at fair value	0	9,277
Derivative liabilities, at fair value	4,359	332
Total margin balances on derivative contracts	4,556	(1,377)
Not Designated as Hedging Instrument, Economic Hedge [Member] | Interest Rate Swap [Member]
Derivative assets, at fair value	0	4,574
Derivative liabilities, at fair value	4,359	0
Not Designated as Hedging Instrument, Economic Hedge [Member] | TBA Contracts [Member]
Derivative assets, at fair value	0	4,703
Derivative liabilities, at fair value	0	332
Restricted Cash and Cash Equivalent, Current	3,169	280
TBA securities (including margin received on unsettled trades)	(3,100)	(4,282)
Not Designated as Hedging Instrument, Economic Hedge [Member] | Eurodollar Future Margin [Member]
Restricted Cash and Cash Equivalent, Current	$ 4,487	$ 2,625