Net Loss Per Share - Additional Information (Details) - shares shares in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Antidilutive common stock equivalent shares excluded from calculation of diluted net income (loss) per share (in shares)	0.1	0.2	0.2