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Note 1 - Organization and Significant Accounting Policies - Equity-based Compensation Expenses Related to Stock Options, SARs, RSUs and Employee Stock Purchase Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Total equity-based compensation expense	$ 15,575	$ 16,198	$ 14,505
Cost of Sales [Member]
Total equity-based compensation expense	713	826	687
Research and Development Expense [Member]
Total equity-based compensation expense	9,298	9,133	8,259
Sales and Marketing [Member]
Total equity-based compensation expense	1,801	1,776	1,503
General and Administrative Expense [Member]
Total equity-based compensation expense	3,763	3,795	2,888
Total Equity-based Compensation Expense From Continuing Operations [Member]
Total equity-based compensation expense	15,575	15,530	13,337
Equity-based Compensation Expense Included in Discontinued Operations [Member]
Total equity-based compensation expense	$ 0	$ 668	$ 1,168