Note 7 - Offsetting Assets and Liabilities - Offsetting Assets (Details) - Assets [Member] - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Gross amount, recognized	$ 6,710	$ 9,277
Gross Amount, offset	0	0
Net Amount	6,710	9,277
Gross Amount, not recognized	0	0
Gross amount, not offset	(1,403)	(4,282)
Net amount, after deduction	5,307	4,995
Interest Rate Swap [Member]
Gross amount, recognized	6,267	4,574
Gross Amount, offset	0	0
Net Amount	6,267	4,574
Gross Amount, not recognized	0	0
Gross amount, not offset	0	0
Net amount, after deduction	6,267	4,574
TBA Contracts [Member]
Gross amount, recognized	443
Gross Amount, offset	0
Net Amount	443
Gross Amount, not recognized	0
Gross amount, not offset	(1,403)
Net amount, after deduction	$ (960)
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