Quarterly report pursuant to Section 13 or 15(d)

Net Loss Per Share (Details)

v3.4.0.3
Net Loss Per Share (Details) - shares
shares in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Antidilutive securities excluded from the computation of diluted net loss per share    
Antidilutive securities excluded from computation of earnings per share (in shares) 22,153 20,356
Employee Stock Option    
Antidilutive securities excluded from the computation of diluted net loss per share    
Antidilutive securities excluded from computation of earnings per share (in shares) 21,856 20,077
Warrant to purchase common stock    
Antidilutive securities excluded from the computation of diluted net loss per share    
Antidilutive securities excluded from computation of earnings per share (in shares) 200 200
Employee Stock Purchase Plan    
Antidilutive securities excluded from the computation of diluted net loss per share    
Antidilutive securities excluded from computation of earnings per share (in shares) 97 79