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Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
U.S. federal tax provision at statutory rate	$ 7,479	$ 1,579	$ 4,542
State taxes	651	224	236
Non-deductible expenses	1,424	1,373	1,212
Acquisition costs	0	0	845
Share-based compensation expense	414	39	1,941
Research tax credits	(3,230)	(3,233)	(2,075)
Domestic production deduction	0	(621)	(890)
Restructuring impact	(4,205)	0	0
Foreign derived intangible income deduction	(349)	0	0
Tax audit settlement	0	0	(2,499)
Foreign rate differential	561	938	(154)
Stock option tax benefit	(4,419)	(5,926)	0
One-time impact of the Tax Act	0	(20,005)	0
Other	(439)	(374)	62
Total provision for (benefit from) income taxes	$ (2,113)	$ (26,006)	$ 3,220

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