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Summary of Significant Accounting Policies (Details 1) - USD ($)
Sep. 30, 2019
Dec. 31, 2018
Gross property and equipment $ 8,880,000 $ 8,578,000
Accumulated depreciation and amortization (6,051,000) (5,310,000)
Net property and equipment 2,829,000 3,268,000
Production tooling, machinery and equipment [Member]    
Gross property and equipment 3,728,000 3,694,000
Office furniture and fixtures [Member]    
Gross property and equipment 385,000 385,000
Computer equipment and software [Member]    
Gross property and equipment 4,190,000 2,743,000
Leasehold improvements [Member]    
Gross property and equipment 577,000 577,000
Construction in-progress [Member]    
Gross property and equipment $ 0 $ 1,179,000