Employee Equity-Based Compensation - Equity-Based Compensation Expense and Tax Benefit (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Equity-based compensation expense	$ 4,676	$ 3,131	$ 12,291	$ 9,409
Cost capitalized to inventory	61	92	199	332
Performance-based stock option expense
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Equity-based compensation expense			109	107
Performance-based RSU expense
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Equity-based compensation expense			401	0
Cost of sales
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Equity-based compensation expense	119	65	249	172
Research and development
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Equity-based compensation expense	1,349	897	2,807	3,226
Sales, general and administrative
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Equity-based compensation expense	$ 3,208	$ 2,169	$ 9,235	$ 6,011