XML 36 R25.htm IDEA: XBRL DOCUMENT v3.10.0.1
Summary of Significant Accounting Policies (Anti-Dilutive Shares Excluded from Computation of Diluted Net Loss per Share) (Details) - shares
shares in Thousands
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Stock Options [Member]    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Anti-dilutive shares outstanding excluded from computation 27,397 25,133
RSUs with Time-Based Vesting [Member]    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Anti-dilutive shares outstanding excluded from computation 349  
RSUs with Performance-Based Vesting [Member]    
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]    
Anti-dilutive shares outstanding excluded from computation 634