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Inventories
9 Months Ended
Sep. 30, 2012
Inventories [Abstract]  
Inventories
3.  Inventories

Inventories consist of the following:

 
 
September 30,
  
December 31,
 
(in thousands)
 
2012
  
2011
 
Raw materials and supplies
 
$
3,159
  
$
2,313
 
Work-in-process
  
10,150
   
10,149
 
Finished goods
  
4,936
   
2,199
 
Total inventories
 
$
18,245
  
$
14,661