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Inventory (Tables)
6 Months Ended
Jun. 30, 2017
Inventory Disclosure [Abstract]  
Schedule of Inventory

    June 30,     December 31,  
    2017     2016  
    ($ in thousands)  
Finished goods   $ 113     $ 83  
Work in process     93       233  
Raw materials and supplies     223       184  
    $ 429     $ 500