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Property and Equipment (Details) - USD ($)
Dec. 31, 2017
Dec. 31, 2016
Property, Plant and Equipment [Line Items]    
Gross Property and Equipment $ 7,791,000 $ 6,723,000
Accumulated depreciation and amortization (5,121,000) (4,293,000)
Net Property and Equipment 2,670,000 2,430,000
Machinery And Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Gross Property and Equipment 4,003,000 4,000,000
Furniture And Fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Gross Property and Equipment 325,000 322,000
Computer Equipment and Software [Member]    
Property, Plant and Equipment [Line Items]    
Gross Property and Equipment 2,680,000 1,301,000
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Gross Property and Equipment 577,000 577,000
Construction In Progress [Member]    
Property, Plant and Equipment [Line Items]    
Gross Property and Equipment $ 206,000 $ 523,000