Note 10 - Stockholders' Equity and Stock-based Compensation - Summary of Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Stock-based compensation	$ 67,579	$ 40,035	$ 34,892
Cost of Sales [Member]
Stock-based compensation	3,782	2,767	2,262
Research and Development Expense [Member]
Stock-based compensation	10,750	13,502	11,151
Selling and Marketing Expense [Member]
Stock-based compensation	6,323	5,785	4,984
General and Administrative Expense [Member]
Stock-based compensation	$ 46,724	$ 17,981	$ 16,495