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Inventory (Tables)
3 Months Ended
Mar. 31, 2017
Inventory Disclosure [Abstract]  
Schedule of Inventory

    March 31,     December 31,  
    2017     2016  
    ($ in thousands)  
Finished goods   $ 109     $ 83  
Work in process     97       233  
Raw materials and supplies     123       184  
    $ 329     $ 500