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Property and Equipment (Tables)
3 Months Ended
Mar. 31, 2019
Property, Plant and Equipment [Abstract]  
Schedule of property and equipment
   March 31,
2019
   December 31,
2018
 
Shop machinery and equipment  $104,468   $87,534 
Computers and electronics   38,961    32,093 
Office furniture and fixtures   37,814    37,814 
Leasehold improvements   26,473    19,514 
    207,716    176,955 
Less - accumulated depreciation   (132,528)   (123,725)
   $75,188   $53,230