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Earnings (Loss) Per Share (Tables)
 9 Months Ended
Sep. 30, 2019
Earnings Per Share [Abstract]  
Calculations of Basic and Diluted Net Loss per Share The calculations of basic and diluted net loss per share are as follows:

 

 

 

Three Months Ended

September 30,

 

 

Nine Months Ended

September 30,

 

 

 

2019

 

 

2018

 

 

2019

 

 

2018

 

Net loss (numerator)

 

$

(19,583

)

 

$

(15,884

)

 

$

(57,968

)

 

$

(53,671

)

Weighted-average shares, in thousands (denominator)

 

 

139,589

 

 

 

138,586

 

 

 

139,025

 

 

 

138,344

 

Basic and diluted net loss per share

 

$

(0.14

)

 

$

(0.12

)

 

$

(0.42

)

 

$

(0.39

)