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Significant Accounting Policies (Narrative) (Details) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Cash equivalents
Estimated useful lives of patents 20 years  
Advertising costs $ 1,251 12,130
Engineering and development costs $ 6,981 $ 9,068
Options granted 5,000 30,000
FDIC insured limit $ 250,000  
Shares excluded from computation loss per share 4,170,162 4,680,840
Minimum [Member]    
Property and equipment, estimated useful life 3 years  
Maximum [Member]    
Property and equipment, estimated useful life 5 years