Note 7 - Offsetting Assets and Liabilities - Offsetting Assets (Details) - Assets [Member] - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Gross amount, recognized	$ 16,846	$ 6,420
Gross Amount, offset	0	0
Net Amount	16,846	6,420
Gross Amount, not recognized	0	0
Gross amount, not offset	(1,593)	0
Net amount, after deduction	15,253	6,420
Interest Rate Swap [Member]
Gross amount, recognized	14,678	6,348
Gross Amount, offset	0	0
Net Amount	14,678	6,348
Gross Amount, not recognized	0	0
Gross amount, not offset	0	0
Net amount, after deduction	14,678	6,348
TBA Contracts [Member]
Gross amount, recognized	2,168
Gross Amount, offset	0
Net Amount	2,168
Gross Amount, not recognized	0
Gross amount, not offset	(1,593)
Net amount, after deduction	$ 575
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