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Inventories (Tables)
3 Months Ended
Mar. 31, 2013
Inventories [Abstract]  
Schedule of inventories
Inventories consist of:
 
(in thousands)
 
March 31, 2013
 
 
December 31, 2012
 
Raw materials
 
$
283
 
 
$
197
 
Work-in-process
 
 
631
 
 
 
405
 
Finished goods
 
 
276
 
 
 
503
 
Total
 
$
1,190
 
 
$
1,105