Note 9 - Stockholders' Equity and Stock-based Compensation - Summary of Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Stock-based compensation	$ 12,820	$ 8,553	$ 24,565	$ 46,755
Cost of Sales [Member]
Stock-based compensation	1,273	841	2,355	1,716
Research and Development Expense [Member]
Stock-based compensation	3,541	2,582	6,828	4,797
Selling and Marketing Expense [Member]
Stock-based compensation	2,305	1,086	4,334	2,714
General and Administrative Expense [Member]
Stock-based compensation	$ 5,701	$ 4,044	$ 11,048	$ 37,528