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Property and Equipment and Inventory - Schedule of Property and Equipment (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2016
Dec. 31, 2015
Property, and Equipment $ 6,162 $ 5,855
Accumulated depreciation (4,815) (4,013)
Property and equipment, net $ 1,347 1,842
Minimum [Member]    
Property and Equipment, Estimated Useful Lives 3 years  
Maximum [Member]    
Property and Equipment, Estimated Useful Lives 5 years  
Production Equipment [Member]    
Property, and Equipment $ 2,051 1,966
Production Equipment [Member] | Minimum [Member]    
Property and Equipment, Estimated Useful Lives 3 years  
Production Equipment [Member] | Maximum [Member]    
Property and Equipment, Estimated Useful Lives 5 years  
Research and Development Equipment [Member]    
Property, and Equipment $ 3,581 3,572
Research and Development Equipment [Member] | Minimum [Member]    
Property and Equipment, Estimated Useful Lives 3 years  
Research and Development Equipment [Member] | Maximum [Member]    
Property and Equipment, Estimated Useful Lives 5 years  
Leasehold Improvements [Member]    
Property and Equipment, Estimated Useful Lives 5 years  
Property, and Equipment $ 23 23
Computer Equipment [Member]    
Property and Equipment, Estimated Useful Lives 5 years  
Property, and Equipment $ 98 98
Office Equipment [Member]    
Property, and Equipment $ 20 20
Office Equipment [Member] | Minimum [Member]    
Property and Equipment, Estimated Useful Lives 3 years  
Office Equipment [Member] | Maximum [Member]    
Property and Equipment, Estimated Useful Lives 5 years  
Construction in Progress [Member]    
Property, and Equipment $ 389 $ 176