Note 5 - Derivative and Other Hedging Instruments - Schedule of To Be Announced Securities (Details) - Short [Member] - USD ($) $ in Thousands		Jun. 30, 2024	Dec. 31, 2023
Three Percent TBA Securities [Member]
Notional amount	[1]	$ (400,000)	$ (70,700)
Cost basis	[2]	(340,281)	(59,278)
Market value	[3]	(341,125)	(62,647)
Net carrying value	[4]	(844)	(3,369)
TBA Contracts [Member]
Notional amount	[1]	(400,000)	(645,700)
Cost basis	[2]	(340,281)	(624,413)
Market value	[3]	(341,125)	(637,107)
Net carrying value	[4]	$ (844)	(12,694)
Five Percent TBA Securities [Member]
Notional amount	[1]		(250,000)
Cost basis	[2]		(242,725)
Market value	[3]		(247,657)
Net carrying value	[4]		(4,932)
Five and a Half Percent TBA Securities [Member]
Notional amount	[1]		(325,000)
Cost basis	[2]		(322,410)
Market value	[3]		(326,803)
Net carrying value	[4]		$ (4,393)

[1] Notional amount represents the par value (or principal balance) of the underlying Agency RMBS.

[2] Cost basis represents the forward price to be paid (received) for the underlying Agency RMBS.

[3] Market value represents the current market value of the TBA securities (or of the underlying Agency RMBS) as of period-end.

[4] Net carrying value represents the difference between the market value and the cost basis of the TBA securities as of period-end and is reported in derivative assets (liabilities), at fair value in our balance sheets