Note 2 - Summary of Significant Accounting Policies - Stock-based Compensation (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($)
Cost of Sales [Member]
Stock-based Compensation	$ 19,605
Cost of Sales [Member] | Previously Reported [Member]
Stock-based Compensation	19,289
Cost of Sales [Member] | Revision of Prior Period, Reclassification, Adjustment [Member]
Stock-based Compensation	316
Gross Profit [Member]
Stock-based Compensation	75,715
Gross Profit [Member] | Previously Reported [Member]
Stock-based Compensation	76,031
Gross Profit [Member] | Revision of Prior Period, Reclassification, Adjustment [Member]
Stock-based Compensation	(316)
Selling and Marketing Expense [Member]
Stock-based Compensation	49,881
Selling and Marketing Expense [Member] | Previously Reported [Member]
Stock-based Compensation	40,654
Selling and Marketing Expense [Member] | Revision of Prior Period, Reclassification, Adjustment [Member]
Stock-based Compensation	9,227
General and Administrative Expense [Member]
Stock-based Compensation	20,918
General and Administrative Expense [Member] | Previously Reported [Member]
Stock-based Compensation	30,656
General and Administrative Expense [Member] | Revision of Prior Period, Reclassification, Adjustment [Member]
Stock-based Compensation	(9,738)
Research and Development Expense [Member]
Stock-based Compensation	8,760
Research and Development Expense [Member] | Previously Reported [Member]
Stock-based Compensation	8,564
Research and Development Expense [Member] | Revision of Prior Period, Reclassification, Adjustment [Member]
Stock-based Compensation	$ 196