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Note 5 - Marketable Securities - Schedule of Contractual Maturity (Details) $ in Thousands	Sep. 30, 2025 USD ($)
Due in one year or less, amortized cost	$ 61,116
Due in one year or less, fair value	61,137
Due after one year through five years, amortized cost	197,511
Due after one year through five years, fair value	197,634
Due after five years through ten years	0
Due after ten years, amortized cost	3,951
Due after ten years, fair value	3,951
Total marketable securities, amortized cost	262,578
Total marketable securities, fair value	$ 262,722

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