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Inventory (Tables)
6 Months Ended
Jun. 30, 2018
Inventory Disclosure [Abstract]  
Schedule of Inventory

    June 30,     December 31,  
    2018     2017  
    ($ in thousands)  
Finished goods   $ 264     $ 174  
Work in process     40       63  
Raw materials and supplies     333       296  
    $ 637     $ 533