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Note 3 - Marketable Securities - Available-for-sale Marketable Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Marketable securities	$ 179,302	$ 143,117
Corporate Bonds [Member]
Available For Sale Securities Debt Maturities Within One Year Amortized Cost	106,154	61,113
Available-for-sale - matures within one year, Gross unrealized gains	157	41
Available-for-sale - matures within one year, Gross unrealized losses	(407)	(146)
Available-for-sale- matures within one year, Fair Value	105,904	61,008
Available-for-sale - matures after one year through five years, amortized cost	73,103	83,491
Available-for-sale - matures after one year through five years, Gross unrealized gains	366	221
Available for Sale Matures after One Year Through Five Years, Gross Unrealized Loss	(71)	(1,603)
Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value	73,398	82,109
Amortized cost	179,257	144,604
Gross unrealized gains	523	262
Gross unrealized losses	(478)	(1,749)
Marketable securities	$ 179,302	$ 143,117

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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