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Net Loss Per Share (Tables)
 3 Months Ended
Mar. 31, 2017
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):

 

 

 

Three Months Ended March 31,

 

 

 

2017

 

 

2016

 

Stock options issued and outstanding

 

 

5,724

 

 

 

4,718

 

Unvested restricted stock units outstanding

 

 

40

 

 

 

—

 

Employee stock purchase plan

 

 

16

 

 

 

—

 

 

 

 

5,780

 

 

 

4,718