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Note 3 - Investments in Debt Securities - Maturities of Debt Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
One year or less, amortized cost	$ 492	$ 2,687
One year or less, fair value	492	2,692
Greater than one year through five years, amortized cost	0	0
Greater than one year through five years, fair value	0	0
Fair value, amortized cost	492	2,687
Fair value	$ 492	$ 2,692

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- Definition

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

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Fair value of investment in debt security measured at amortized cost (held-to-maturity), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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