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Net Loss Per Share (Tables)
 12 Months Ended
Dec. 31, 2016
Earnings Per Share [Abstract]  
Schedules for Computation of Diluted Weighted-Average Shares Outstanding

The following potentially dilutive securities outstanding at the end of the period were excluded from the computations of diluted weighted-average shares outstanding for the periods indicated as they would be anti-dilutive (in thousands):

 

 

 

Years Ended December 31,

 

 

 

2016

 

 

2015

 

 

2014

 

Stock options issued and outstanding

 

 

5,118

 

 

 

3,684

 

 

 

2,107

 

Unvested restricted stock units outstanding

 

 

40

 

 

 

—

 

 

 

—

 

Employee stock purchase plan

 

 

22

 

 

 

—

 

 

 

—

 

Series A Preferred Stock

 

 

—

 

 

 

—

 

 

 

2,393

 

Series B Preferred Stock

 

 

—

 

 

 

—

 

 

 

1,906

 

Debt with share settlement option (Note 12)

 

 

—

 

 

 

—

 

 

 

3,715

 

 

 

 

5,180

 

 

 

3,684

 

 

 

10,121