Net Income (Loss) Per Share - Reconciliation of basic and diluted EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Net income (loss)	$ 7,028	$ (33,226)	$ (95,304)
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Basic shares (in shares)	52,996	37,403	37,325
Effect of dilutive securities—employee and director equity awards outstanding (in shares)	1,945	0	0
Diluted shares (in shares)	54,941	37,403	37,325
Net income (loss) per share - basic (in usd per share)	$ 0.13	$ (0.89)	$ (2.55)
Net income (loss) per share - diluted (in usd per share)	$ 0.13	$ (0.89)	$ (2.55)