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Net Loss Per Share (Tables)
 9 Months Ended
Sep. 30, 2013
Earnings Per Share [Abstract]  
Calculations of Net Loss Per Share
The calculations of net loss per share were as follows:
   
Three Months Ended September 30,
 
Nine Months Ended September 30,
   
2013
 
2012
 
2013
 
2012
 
(In thousands except per share data)
(Unaudited)
Basic and Diluted:
   
 
   
 
   
 
   
Net loss
$
(19,430
)
 
$
(8,757
)
 
$
(59,492
)
 
$
(28,554
)
Weighted average common shares outstanding
21,494

 
20,999

 
21,245

 
20,935

Net loss per share
$
(0.90
)
 
$
(0.42
)
 
$
(2.80
)
 
$
(1.36
)