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Net Loss Per Share (Tables)
9 Months Ended
Sep. 30, 2016
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     Nine Months Ended
      September 30,     September 30,
      2016     2015     2016     2015
Numerator:                        
Net loss available for common shareholders - basic and diluted   $ (4,070)   $ (3,513)   $ (11,102)   $ (10,244)
                         
Denominator:                        
Weighted-average common shares outstanding - basic and diluted       52,111      47,216      50,421      46,292 
                         
Net loss per share - basic and diluted     $ (0.08)   $ (0.07)   $ (0.22)   $ (0.22)