Note 3 - Stock-based Compensation - Stock-based Compensation Plan Expenses (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Share based compensation expense		$ 39,811	$ 28,583
Tax benefit related to stock-based compensation	[1]	573	430
Cost of Sales [Member]
Share based compensation expense		1,307	816
Research and Development Expense [Member]
Share based compensation expense		8,401	6,165
Selling, General and Administrative Expenses [Member]
Share based compensation expense		$ 30,103	$ 21,602

[1] Amount reflects the tax benefit related to stock-based compensation recorded for equity awards that are expected to generate tax deductions when they vest in future periods. Equity awards granted to the Company’s executive officers are subject to the tax deduction limitations set by Section 162(m) of the Internal Revenue Code (“IRC”).