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Net Loss per Share
 3 Months Ended
Mar. 31, 2015
Earnings Per Share [Abstract]  
Net Loss per Share
Net Loss per Share
Basic 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 Preferred Stock and outstanding stock options and warrants, to the extent dilutive. Basic and diluted net loss per share was the same for each period presented as the inclusion of all potential shares of common stock outstanding would have been anti-dilutive.
Net loss is allocated based on the contractual participation rights of the Class A and Class B common stock as if the earnings for the year have been distributed. As the liquidation and dividend rights are identical, the net loss is allocated on a proportionate basis.
The following table presents the calculation of basic and diluted net loss per share for our common stock (in thousands, except per share data):
 
Three Months Ended March 31,
 
 
2015
 
2014
 
 
Class A
 
Class B
 
Class A
 
Class B
 
Net loss
$
(12,562
)
 
$
(7,081
)
 
$
(21,983
)
 
$
(2,298
)
 
Weighted-average shares used to compute basic and diluted net loss per share
58,698

 
33,088

 
24,417

 
2,553

 
Basic and diluted net loss per share
$
(0.21
)
 
$
(0.21
)
 
$
(0.90
)
 
$
(0.90
)
 

The following securities were excluded from the calculation of diluted net loss per share for common stock because their effect would have been anti-dilutive for the periods presented (in thousands):
 
Three Months Ended March 31,
 
2015
 
2014
Stock options and restricted common stock
15,898

 
17,931

Warrants
115

 
115

Total
16,013

 
18,046