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Net Loss Per Share Attributable to Common Stockholders
 6 Months Ended
Jun. 30, 2017
Earnings Per Share [Abstract]  
Net Loss Per Share Attributable to Common Stockholders
Net Loss Per Share Attributable to Common Stockholders
 
The following table summarizes the computation of basic and diluted net loss per share attributable to common stockholders of the Company (in thousands, except share and per share data):

 
 
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
 
2017
 
2016
 
2017
 
2016
Net loss attributable to common stockholders—basic and diluted
 
$
(9,381
)
 
(5,638
)
 
$
(14,358
)
—

(12,209
)
Weighted-average number of common shares—basic and diluted
 
20,856,693

 
20,831,723

 
20,853,628

 
20,831,139

Net loss per share attributable to common stockholders—basic and diluted
 
$
(0.45
)
 
$
(0.27
)
 
$
(0.69
)
 
$
(0.59
)
  
As of June 30, 2017 and 2016 the Company has excluded 1,587,874 and 1,905,142 potentially dilutive stock options outstanding, respectively, from the computation of diluted weighted average common shares outstanding, prior to the use of the treasury stock method or if-converted method, because including them would have had an anti-dilutive effect due to the losses reported.
 
As the Company incurred a net loss for the three and six months ended June 30, 2017 there is no income allocation required under the two‑class method or dilution attributed to weighted‑average shares outstanding in the computation of diluted loss per share attributable to common stockholders.