Income Taxes - Effective Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Effective Income Tax Rate Reconciliation, Amount [Abstract]
(Loss) income before income tax (benefit) expense	$ (13,423)	$ (2,185)	$ 11,559
Income taxes computed at the Federal statutory rate	(2,819)	(459)	4,046
State income taxes, net of Federal benefit	(567)	306	472
Goodwill impairment	2,243	0	0
Impact of 2017 Tax Act	0	0	24,235
Research and development and other tax credits	(1,790)	(1,144)	(1,775)
Excess executive compensation	322	281	0
Other	(47)	310	(113)
(Benefit from) provision for income taxes	$ (2,658)	$ (706)	$ 26,865
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Income taxes computed at the Federal statutory rate	21.00127%	21.00686%	35.00303%
State income taxes, net of Federal benefit	4.20%	(14.00%)	4.10%
Goodwill impairment	(16.70%)	0.00%	0.00%
Impact of 2017 Tax Act	0.00%	0.00%	209.70%
Research and development and other tax credits	13.30%	52.40%	(15.40%)
Excess executive compensation	(2.40%)	(12.90%)	0.00%
Other	0.40%	(14.20%)	(1.00%)
(Benefit from) provision for income taxes	19.80%	32.30%	232.40%