Note 7 - Offsetting Assets and Liabilities - Offsetting Assets (Details) - Assets [Member] - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Gross amount, recognized	$ 9,277	$ 6,420
Gross Amount, offset	0	0
Net Amount	9,277	6,420
Gross Amount, not recognized	0	0
Gross amount, not offset	(4,282)	0
Net amount, after deduction	4,995	6,420
Interest Rate Swap [Member]
Gross amount, recognized	4,574	6,348
Gross Amount, offset	0	0
Net Amount	4,574	6,348
Gross Amount, not recognized	0	0
Gross amount, not offset	0	0
Net amount, after deduction	4,574	6,348
TBA Contracts [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
Payer Swaptions [Member]
Gross amount, recognized		72
Gross Amount, offset		0
Net Amount		72
Gross Amount, not recognized		0
Gross amount, not offset		0
Net amount, after deduction		$ 72