Note 4 - Marketable Securities - Schedule of Contractual Maturity (Details) $ in Thousands	Dec. 31, 2024 USD ($)
Due in one year or less, amortized cost	$ 86,122
Due in one year or less, fair value	85,951
Due after one year through five years, amortized cost	23,880
Due after one year through five years, fair value	23,855
Due after ten years, amortized cost	3,578
Due after ten years, fair value	3,578
Total marketable securities, amortized cost	113,580
Total marketable securities, fair value	$ 113,384