Stock-Based Compensation - Allocation of Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Allocation of stock-based compensation
Stock-based compensation expense	$ 14,005	$ 7,129
Accrued liability for cash-settled options	2,200
Cost of sales
Allocation of stock-based compensation
Stock-based compensation expense	461	223
Selling, general and administrative
Allocation of stock-based compensation
Stock-based compensation expense	10,257	5,487
Research and development
Allocation of stock-based compensation
Stock-based compensation expense	3,287	$ 1,419
Cash-Settled Stock Option
Allocation of stock-based compensation
Fair value adjustment excluded from APIC	$ (3,200)