Note 6 - Offsetting Assets And Liabilities - Offsetting of Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Repurchase Agreements [Member]
Gross amount of liabilities		$ 117,181
Gross amount offset		0
Net amount of balance sheet liabilities		117,181
Securities posted as collateral		(116,552)
Cash posted as collateral		(629)
Net amount		0
Gross Amount Of Recognized Liabilties [Member]
Gross amount of liabilities	$ 115,511	117,181
Gross Amount Of Recognized Liabilties [Member] | Repurchase Agreements [Member]
Gross amount of liabilities	115,511
Gross Amount Of Liabilties Offset In The Balance Sheet [Member]
Gross amount offset	0	0
Gross Amount Of Liabilties Offset In The Balance Sheet [Member] | Repurchase Agreements [Member]
Gross amount offset	0
Net Amount Of Liabilities Presented In The Balance Sheet [Member]
Net amount of balance sheet liabilities	115,511	117,181
Net Amount Of Liabilities Presented In The Balance Sheet [Member] | Repurchase Agreements [Member]
Net amount of balance sheet liabilities	115,511
Gross Amount Of Financial Instruments Posted Not Offset in Balance Sheet [Member]
Securities posted as collateral	(115,432)	(116,552)
Gross Amount Of Financial Instruments Posted Not Offset in Balance Sheet [Member] | Repurchase Agreements [Member]
Securities posted as collateral	(115,432)
Gross Amounts Of Cash Posted Not Offset In Balance Sheet [Member]
Cash posted as collateral	(79)	(629)
Gross Amounts Of Cash Posted Not Offset In Balance Sheet [Member] | Repurchase Agreements [Member]
Cash posted as collateral	(79)
Net Amount Of Liabilities [Member]
Net amount	0	$ 0
Net Amount Of Liabilities [Member] | Repurchase Agreements [Member]
Net amount	$ 0