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Net Loss Per Share
 6 Months Ended
Jun. 30, 2020
Earnings Per Share [Abstract]  
Net Loss Per Share Net Loss Per ShareBasic net loss per share is computed by dividing the net loss by the weighted-average number of shares of common stock outstanding during the period. Diluted net loss per share is computed by giving effect to all potential shares of common stock, including convertible senior notes, outstanding stock options, stock related to unvested restricted stock units, and common stock issuable pursuant to the ESPP to the extent dilutive. Basic and diluted net loss per share was the same for each period presented, as the inclusion of all potential common shares outstanding would have been anti-dilutive.
The net loss per share is allocated based on the participation rights of the Class A and Class B common shares as if the loss for the year has been distributed. As the liquidation and dividend rights are identical, the net loss is allocated on a proportionate basis.
A reconciliation of the denominator used in the calculation of basic and diluted loss per share is as follows (in thousands, except share and per share data):
Three months ended
June 30, 2020June 30, 2019
Class A
Class B
Class A
Class B
Numerator
Net loss$(16,257) $(3,508) $(6,626) $(1,696) 
Denominator
Weighted-average common shares outstanding - basic and diluted39,622,989  8,548,563  36,758,866  9,407,794  
Basic and diluted net loss per share$(0.41) $(0.41) $(0.18) $(0.18) 

Six months ended
June 30, 2020June 30, 2019
Class AClass BClass AClass B
Numerator
Net loss$(24,905) $(5,433) $(12,523) $(3,262) 
Denominator
Weighted-average common shares outstanding - basic and diluted39,287,647  8,570,981  36,255,515  9,445,044  
Basic and diluted net loss per share$(0.63) $(0.63) $(0.35) $(0.35) 

The anti-dilutive securities excluded from the weighted-average shares used to calculate the diluted net loss per common share were as follows:
As of
June 30, 2020June 30, 2019
Shares subject to outstanding common stock options3,639,228  4,957,839  
Shares subject to unvested restricted stock units3,006,717  2,780,345  
Shares issuable pursuant to the ESPP103,231  89,311  
Additionally, approximately 4.3 million shares of our Class A common stock underlying the conversion option in the Notes, are not considered in the calculation of diluted net loss per share as the effect would be anti-dilutive. We use the treasury stock method for calculating any potential dilutive effect of the conversion option on diluted net income per share, if applicable. During the six months ended June 30, 2020, the average market price of our Class A common stock did not exceed the conversion price of the Notes of $80.16 per share.