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5. Inventory (Tables)
9 Months Ended
Sep. 30, 2013
Inventory Tables  
Schedule of inventory
    September 30,     December 31,  
    2013     2012  
Finished goods   $ 13,252     $ 11,595  
Raw materials     2,226       3,202  
Work in process     530       530  
Total   $ 16,008     $ 15,327