Organization and Summary of Significant Accounting Policies - Weighted Average Number of Shares Outstanding and Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Numerator for basic and diluted earnings per share:
Net loss	$ (47,117)	$ (47,917)	$ (30,759)	$ 4,074	$ (95,034)	$ (26,685)
Denominator:
Weighted average shares outstanding basic (in shares)	65,166		60,346		64,604	59,977
Diluted weighted average shares outstanding (in shares)	65,166		60,346		64,604	59,977
Anti-dilutive stock-based awards excluded (in shares)	10,537		12,773		8,950	12,866
Net loss per common share:
Basic (in dollars per share)	$ (0.72)		$ (0.51)		$ (1.47)	$ (0.44)
Diluted (in dollars per share)	$ (0.72)		$ (0.51)		$ (1.47)	$ (0.44)