Description of the Company and Basis of Presentation - Revised Total Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Change in Stockholders' Equity
Balance	$ 258,818	$ 262,294	$ 246,771	$ 251,639	$ 262,294	$ 251,639
Net income (loss)	(2,025)	4	(2,511)	(6,056)	(2,021)	(8,567)
Balance	257,207	258,818	243,578	246,771	257,207	243,578
As Previously Reported
Change in Stockholders' Equity
Balance	260,639	264,021	247,958	252,441	264,021	252,441
Net income (loss)		98	(2,461)	(5,671)		(8,133)
Balance		260,639	244,815	247,958		244,815
Adjustment
Change in Stockholders' Equity
Balance	$ (1,821)	(1,727)	(1,187)	(802)	$ (1,727)	(802)
Net income (loss)		(94)	(50)	(385)		(434)
Balance		$ (1,821)	$ (1,237)	$ (1,187)		$ (1,237)