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4. Inventory (Tables)
9 Months Ended
Sep. 30, 2015
Inventory Disclosure [Abstract]  
Schedule of Inventory

Inventories are stated at the lower of cost or market. Inventories consist of the following (in thousands):

      September 30,     December 31,
      2015     2014
Raw materials   $ 1,896    $ 499 
Work-in-process     2,265     
Finished goods     8,679      12,200 
Inventory, gross     12,840      12,699 
Reserve for obsolescence     (2,179)     (2,220)
     Inventory, net   $ 10,661    $ 10,479