Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
U.S. federal tax provision at statutory rate	$ (682)	$ 16,181	$ 16,998
State taxes	(311)	1,365	1,533
Non-deductible expenses	1,212	551	809
Acquisition costs	845	239	229
Share-based compensation expense	1,941	748	461
Research tax credits	(2,075)	(1,324)	(818)
Domestic production deduction	(890)	(1,133)	(1,127)
Gain on investment	0	(1,205)	0
Tax audit settlement	(2,499)	0	0
Other	(92)	62	(99)
Total provision for (benefit from) income taxes	$ (2,551)	$ 15,484	$ 17,986