Basic and Diluted Net Income (Loss) Per Share - Earnings (Loss) Per Share Calculation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income (loss)	$ (10,008)	$ (2,965)
Weighted average shares used to calculate net income (loss) per share, basic	38,715	37,007
Weighted average shares used to calculate net income (loss) per share, diluted	38,715	37,007
Basic (in dollars per share)	$ (0.26)	$ (0.08)
Diluted (in dollars per share)	$ (0.26)	$ (0.08)
Restricted Stock Units (RSUs) [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Effect of dilutive equity awards	0	0
Stock Options [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Effect of dilutive equity awards	0	0