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

    September 30,     December 31,  
    2018     2017  
    ($ in thousands)  
Finished goods   $ 428     $ 174  
Work in process     41       63  
Raw materials and supplies     347       296  
    $ 816     $ 533