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Inventory (Tables)
6 Months Ended
Jun. 30, 2017
Inventory Tables  
Inventory (Tables)

Inventory consists of the following:

      June 30,     December 31,
(in thousands)     2017     2016
Raw materials   $ 1,142    $ 999 
Finished goods     1,535      234 
    $ 2,677    $ 1,233