Note 9 - Derivative Financial Instruments (Details Textual) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Short [Member] | Equity Derivatives [Member]
Derivative Asset	$ 73	$ 73
Short [Member] | TBA and Other Forward MBS [Member]
Derivative, Notional Amount	1,648,575	1,197,975
Long [Member] | TBA and Other Forward MBS [Member]
Derivative, Notional Amount	1,632,350	1,179,500
Call Option [Member] | Short [Member]
Derivative Assets (Liabilities), at Fair Value, Net	$ 11	$ 0