Note 8 - Goodwill and Identifiable Intangible Assets - Finite-lived Intangible Assets, Accumulated Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Amortization of intangible assets	$ 62,492	$ 57,224	$ 14,170
Cost of Sales [Member]
Amortization of intangible assets	32,845	28,502	12,223
Research and Development Expense [Member]
Amortization of intangible assets	19,311	18,352	336
Selling and Marketing Expense [Member]
Amortization of intangible assets	9,727	9,727	1,209
General and Administrative Expense [Member]
Amortization of intangible assets	$ 609	$ 643	$ 402