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						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Numerator for basic and diluted earnings per share:
Net loss	$ 48,524	$ (47,117)	$ (47,917)	$ (873)	$ (30,759)	$ 4,074	$ (46,510)	$ (27,558)
Denominator:
Weighted average shares outstanding basic (in shares)	66,192			63,496			65,139	61,159
Dilutive effect of stock-based awards (in shares)	6,249
Diluted weighted average shares outstanding (in shares)	72,441			63,496			65,139	61,159
Anti-dilutive stock-based awards excluded (in shares)	3,481			12,793			8,920	12,904
Net loss per common share:
Basic (in dollars per share)	$ 0.73			$ (0.01)			$ (0.71)	$ (0.45)
Diluted (in dollars per share)	$ 0.67			$ (0.01)			$ (0.71)	$ (0.45)