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Summary of Significant Accounting Policies (Details 1) - USD ($)
Dec. 31, 2017
Dec. 31, 2016
Accounting Policies [Abstract]    
Raw materials $ 68,000 $ 123,000
Work-in-process 10,000 27,000
Finished goods 223,000 175,000
Inventories $ 301,000 $ 325,000