Note 6 - Pledged Assets (Tables)

12 Months Ended

Dec. 31, 2025

Notes Tables

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

(in thousands)
	December 31, 2025						December 31, 2024
	Repurchase		Derivative				Repurchase		Derivative
Assets Pledged to Counterparties	Agreements		Agreements		Total		Agreements		Agreements		Total
PT RMBS - fair value	$	10,489,655	$	-	$	10,489,655	$	5,193,570	$	-	$	5,193,570
Structured RMBS - fair value		13,088		-		13,088		15,498		-		15,498
U.S. Treasury securities - fair value		-		135,133		135,133		-		100,551		100,551
Accrued interest on pledged securities		48,537		36		48,573		22,852		-		22,852
Restricted cash		51,171		7,525		58,696		22,818		2,905		25,723
Total	$	10,602,451	$	142,694	$	10,745,145	$	5,254,738	$	103,456	$	5,358,194

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

(in thousands)
			Reverse
	Repurchase		Repurchase		Derivative
	Agreements		Agreements		Agreements		Total
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
December 31, 2024
Cash	$	4,465	$	-	$	4,282	$	8,747
U.S. Treasury securities - fair value		4,146		-		-		4,146
Total	$	8,611	$	-	$	4,282	$	12,893