Note 4 - Cash, Cash Equivalents, Investments and Restricted Cash - Restricted Cash (Details) - USD ($) $ in Thousands		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash and cash equivalents		$ 691,816	$ 527,843
Restricted cash included in other current assets	[1]	0	33,204
Restricted cash included in other long-term assets		125	134
Total cash, cash equivalents and restricted cash reported on the Consolidated Statements of Cash Flows		$ 691,941	$ 561,181	$ 288,729	$ 189,389

[1] The restricted cash as of December 31, 2023 was related to preliminary purchase consideration held in a trust account in connection with the Company’s acquisition of Axign.