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Patents (Tables)
 6 Months Ended 12 Months Ended
Dec. 31, 2017
Jun. 30, 2017
Finite-Lived Intangible Assets [Line Items]    
Schedule of patents  
  June 30, 
  2017  2016 
       
Patents $880,000  $880,000 
Less accumulated amortization  (609,000)  (583,000)
         
Patents, net $271,000  $297,000 
Schedule of amortization expense  
  Year Ended June 30, 
  2017  2016 
         
Amortization expense $26,000  $332,000 

 
Patents [Member]    
Finite-Lived Intangible Assets [Line Items]    
Schedule of patents
  As of 
December 31,		  As of
June 30,		 
  2017  2017 
       
Patents $380,000  $380,000 
Less accumulated amortization  (121,000)  (109,000)
Patents, net $259,000  $271,000
  
Schedule of amortization expense
  Three Months Ended
December 31,		  Six Months Ended
December 31,		 
  2017  2016  2017  2016 
                 
Amortization expense $6,000  $6,000  $12,000  $13,000