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Net Loss Per Share (Tables)
 12 Months Ended
Dec. 31, 2018
Earnings Per Share [Abstract]  
Schedule of Basic and Diluted Shares
The computation of net loss per share is as follows (in thousands, except per share amounts):
 
Year Ended December 31,
 
2018
 
2017
Net loss attributable to common stockholders
$
(29,400
)
 
$
(45,020
)
Basic and diluted:
 

 
 
Weighted average shares outstanding
56,106

 
36,569

Less: weighted average restricted shares outstanding
(33
)
 
(124
)
Shares used in calculation of basic and diluted net loss per common share
56,073

 
36,445

Net loss per common share: Basic and diluted
$
(0.52
)
 
$
(1.24
)