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4. Property and Equipment (Tables)
12 Months Ended
Dec. 31, 2018
Property, Plant and Equipment [Abstract]  
Property and equipment
   December 31, 
   2018   2017 
         
Office equipment  $30,000   $30,000 
Furniture and fixtures   5,000    5,000 
Testing equipment   37,000    37,000 
Leasehold Improvements   25,000    25,000 
Subtotal   97,000    97,000 
Less accumulated depreciation   (73,000)   (51,000)
Total  $24,000   $46,000