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Patents (Tables)
3 Months Ended
Sep. 30, 2017
Patents [Abstract]  
Schedule of patents
  As of
September 30,
  As of 
June 30,
 
  2017  2017 
       
Patents $880,000  $880,000 
Less accumulated amortization  (615,000)  (609,000)
Patents, net $265,000  $271,000
Schedule of amortization expense
  Three Months Ended
September 30,
 
  2017  2016 
         
 Amortization expense $6,000  $7,000