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Net Loss per Share (Tables)
 12 Months Ended
Dec. 31, 2016
Net Loss per Share  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The following table presents the calculation of basic and diluted net loss per share for the Company’s common stock (in thousands, except per share data):

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Year Ended 

 

 

 

 

December 31,

 

 

    

    

2016

    

2015

    

2014

 

Net loss

 

 

$
(74,216)

 

$
(58,020)

 

$
(17,037)

 

Preferred stock dividends

 

 

 

 —

 

 

 —

 

 
(2,920)

 

Accretion of preferred stock

 

 

 

 —

 

 

 —

 

 
(168)

 

Net loss

 

 

$
(74,216)

 

$
(58,020)

 

$
(20,125)

 

Weighted-average shares used to compute basic and diluted net loss per share

 

 

 
42,331

 

 
19,917

 

 
1,963

 

Net loss per share, basic and diluted

 

 

$
(1.75)

 

$
(2.91)

 

$
(10.25)