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Note 3 - Marketable Securities - Available-for-sale Marketable Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Marketable securities	$ 143,117	$ 132,695
Corporate Bonds [Member]
Available-for-sale - matures within one year, Amortized cost	61,113	27,690
Available-for-sale - matures within one year, Gross unrealized gains	41	4
Available-for-sale - matures within one year, Gross unrealized losses	(146)	(243)
Available-for-sale - matures within one year, Fair value	61,008	27,451
Available-for-sale - matures after one year through five years, Amortized cost	83,491	108,700
Available-for-sale - matures after one year through five years, Gross unrealized gains	221	278
Available-for-sale - matures after one year through five years, Gross unrealized losses	(1,603)	(3,734)
Available-for-sale - matures after one year through five years, Fair value	82,109	105,244
Available-for-sale, Amortized cost	144,604	136,390
Total	262	282
Total	(1,749)	(3,977)
Marketable securities	$ 143,117	$ 132,695

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-Topic 320
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