Note 7 - Offsetting Assets and Liabilities - Offsetting Assets (Details) - Assets [Member] - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Gross amount, recognized	$ 548	$ 9,277
Gross Amount, offset	0	0
Net Amount	548	9,277
Gross Amount, not recognized	0	0
Gross amount, not offset	(330)	(4,282)
Net amount, after deduction	218	4,995
TBA Contracts [Member]
Gross amount, recognized	548
Gross Amount, offset	0
Net Amount	548
Gross Amount, not recognized	0
Gross amount, not offset	(330)
Net amount, after deduction	$ 218
Interest Rate Swap [Member]
Gross amount, recognized		4,574
Gross Amount, offset		0
Net Amount		4,574
Gross Amount, not recognized		0
Gross amount, not offset		0
Net amount, after deduction		4,574
Payer Swaptions [Member]
Gross amount, recognized		4,703
Gross Amount, offset		0
Net Amount		4,703
Gross Amount, not recognized		0
Gross amount, not offset		(4,282)
Net amount, after deduction		$ 421