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Earnings per Share (Table)
 9 Months Ended
Sep. 30, 2017
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
The following table sets forth the computation of basic and diluted earnings per share for the three and nine months ended September 30, 2017 and 2016:
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
(in thousands, except per share data)
2017
 
2016
 
2017
 
2016
Numerator:
 
 
 
 
 
 
 
Net loss
$
(21,226
)
 
$
(15,708
)
 
$
(60,946
)
 
$
(56,712
)
Denominator:
 
 
 
 
 
 
 
Weighted average shares (basic)
31,867

 
30,469

 
31,527

 
30,341

Dilutive effect of potential common shares
—

 
—

 
—

 
—

Weighted average shares (diluted)
31,867

 
30,469

 
31,527

 
30,341

Basic loss per share
$
(0.67
)
 
$
(0.52
)
 
$
(1.93
)
 
$
(1.87
)
Diluted loss per share
$
(0.67
)
 
$
(0.52
)
 
$
(1.93
)
 
$
(1.87
)