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Net Loss Per Share (Tables)
6 Months Ended
Jun. 30, 2018
Net Loss Per Share Tables  
Net Loss Per Share (Tables)

The components of basic and diluted net loss per share were as follows (in thousands, except loss per share data):

      Three Months Ended     Six Months Ended
      June 30,     June 30,
      2018     2017     2018     2017
Numerator:                        
Net loss available for common shareholders - basic and diluted   $ (8,459)   $ (5,656)   $ (15,591)   $ (11,605)
                         
Denominator:                        
Weighted-average common shares outstanding - basic and diluted       81,321      69,373      79,973      68,747 
                         
Net loss per share - basic and diluted     $ (0.10)   $ (0.08)   $ (0.19)   $ (0.17)