Quarterly report pursuant to Section 13 or 15(d)

Net Loss Per Share - Schedule of Potential Common Shares Outstanding Excluded from the Computation of Diluted Net Loss Per Share (Details)

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Net Loss Per Share - Schedule of Potential Common Shares Outstanding Excluded from the Computation of Diluted Net Loss Per Share (Details) - shares
shares in Thousands
 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Anti-dilutive securities    
Total common stock equivalents (in shares) 35,534 27,921
Options to purchase common stock    
Anti-dilutive securities    
Total common stock equivalents (in shares) 9,665 10,492
Restricted stock units    
Anti-dilutive securities    
Total common stock equivalents (in shares) 23,554 16,653
Performance awards    
Anti-dilutive securities    
Total common stock equivalents (in shares) 2,315 776