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Inventory (Tables)
3 Months Ended
Mar. 31, 2017
Inventory Tables  
Inventory (Tables)

Inventory consists of the following:

      March 31,     December 31,
(in thousands)     2017     2016
Raw materials   $ 1,158    $ 999 
Finished goods     894      234 
    $ 2,052    $ 1,233