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Note 18 - Derivatives (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Unrealized Gain (Loss) on Derivatives	$ 1,188,000	$ (3,814,000)	$ 8,857,000
Asset Pledged as Collateral [Member] | Interest Rate Swap Agreements [Member]
Securities Received as Collateral	0
Designated as Hedging Instrument [Member]
Investment Owned, Cost	189,000,000	236,700,000
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease)	4,300,000	3,200,000
Derivative, Amount of Hedged Item	60,000,000	60,000,000
Not Designated as Hedging Instrument [Member]
Unrealized Gain (Loss) on Derivatives	(29,000)	$ 75,000	$ 2,600,000
Interest Rate Swap [Member]
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	$ 1,600,000

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Amount of hedged item in hedging relationship. Excludes hedged asset or liability.

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The estimated net amount of unrealized gains or losses on interest rate cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months.

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Cost of the investment.

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