Note 15 - Share-based Compensation - Share-based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Total share-based compensation expense	$ 3,129	$ 3,265	$ 8,922	$ 9,804
Cost of Sales [Member]
Total share-based compensation expense	222	230	689	712
Research and Development Expense [Member]
Total share-based compensation expense	489	706	1,682	2,098
Selling and Marketing Expense [Member]
Total share-based compensation expense	272	298	820	884
General and Administrative Expense [Member]
Total share-based compensation expense	$ 2,146	$ 2,031	$ 5,731	$ 6,110