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Net Loss Per Share (Tables)
 6 Months Ended
Jun. 30, 2019
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share Reconciliation
A reconciliation of basic and diluted net loss per share, together with the related shares outstanding in thousands is as follows: 
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
Net Loss Per Share:
 
2019
 
2018
 
2019
 
2018
 
 
 
 
 
 
 
 
 
Net loss
 
$
(8,605
)
 
$
(3,438
)
 
$
(21,623
)
 
$
(15,674
)
 
 
 
 
 
 
 
 
 
Weighted average shares:
 
 

 
 

 
 
 
 
Basic shares
 
37,356

 
36,772

 
37,355

 
37,666

Effect of dilutive securities—employee and director equity awards outstanding and 2023 Notes
 
—

 
—

 
—

 
—

Diluted shares
 
37,356

 
36,772

 
37,355

 
37,666

 
 
 
 
 
 
 
 
 
Net loss per share - basic
 
$
(0.23
)

$
(0.09
)
 
$
(0.58
)
 
$
(0.42
)
Net loss per share - diluted  
 
$
(0.23
)

$
(0.09
)
 
$
(0.58
)
 
$
(0.42
)