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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, 2025	Dec. 31, 2024	Dec. 31, 2023
Total equity-based compensation expense	$ 19,796	$ 15,575	$ 16,198
Cost of Sales [Member]
Total equity-based compensation expense	679	713	826
Research and Development Expense [Member]
Total equity-based compensation expense	10,549	9,298	9,133
Sales and Marketing [Member]
Total equity-based compensation expense	2,397	1,801	1,776
General and Administrative Expense [Member]
Total equity-based compensation expense	6,171	3,763	3,795
Total Equity-based Compensation Expense From Continuing Operations [Member]
Total equity-based compensation expense	19,796	15,575	15,530
Equity-based Compensation Expense Included in Discontinued Operations [Member]
Total equity-based compensation expense	$ 0	$ 0	$ 668