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Note 2 - Investments in Bond Securities - Maturities of Debt Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
One year or less, amortized cost	$ 2,687	$ 2,671
One year or less, fair value	2,692	2,671
Greater than one year through five years, amortized cost	0	464
Greater than one year through five years, fair value	0	468
Amortized cost	2,687	3,135
Fair value	$ 2,692	$ 3,139

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Amount, after allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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