Note 6 - Pledged Assets (Tables)

3 Months Ended

Mar. 31, 2026

Notes Tables

Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block]

(in thousands)
	March 31, 2026						December 31, 2025
	Repurchase		Derivative				Repurchase		Derivative
Assets Pledged to Counterparties	Agreements		Agreements		Total		Agreements		Agreements		Total
PT RMBS - fair value	$	11,246,597	$	-	$	11,246,597	$	10,489,655	$	-	$	10,489,655
Structured RMBS - fair value		12,452		-		12,452		13,088		-		13,088
U.S. Treasury securities		-		149,585		149,585		-		135,133		135,133
Accrued interest on pledged securities		51,934		1,502		53,436		48,537		36		48,573
Restricted cash		82,612		3,502		86,114		51,171		7,525		58,696
Total	$	11,393,595	$	154,589	$	11,548,184	$	10,602,451	$	142,694	$	10,745,145

Schedule of Financial Instruments Pledged as Collateral From Counterparties [Table Text Block]

(in thousands)
			Reverse
	Repurchase		Repurchase		Derivative
	Agreements		Agreements		Agreements		Total
March 31, 2026
Cash	$	194	$	-	$	337	$	531
U.S. Treasury securities - fair value		549		359,202		-		359,751
Total	$	743	$	359,202	$	337	$	360,282
December 31, 2025
Cash	$	12,549	$	-	$	360	$	12,909
U.S. Treasury securities - fair value		-		128,724		-		128,724
Total	$	12,549	$	128,724	$	360	$	141,633