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Inventory (Tables)
3 Months Ended
Mar. 31, 2019
Inventory Disclosure [Abstract]  
Schedule of Inventory

 

    March 31,     December 31,  
    2019     2018  
    ($ in thousands)  
Finished goods   $ 216     $ 284  
Work in process     340       111  
Raw materials and supplies     891       739  
    $ 1,447     $ 1,134