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Patents
6 Months Ended
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Patents

The cost of the oxidation reduction potential (“ORP”) related patents for the RedoxSYS and MiOXSYS Systems was $380,000 when they were acquired and are being amortized over the remaining U.S. patent life of approximately 15 years as of the date, which expires in March 2028. Patents consist of the following:

  

    As of December 31,     As of June 30,  
    2018     2018  
             
             
Patents   $ 380,000     $ 380,000  
Less accumulated amortization     (147,000 )     (134,000 )
                 
   Patents, net   $ 233,000     $ 246,000  

 

The amortization expense was as follows:

 

    Three Months Ended December 31,     Six Months Ended December 31,  
    2018     2017     2018     2017  
Amortization expense   $ 7,000     $ 6,000     $ 13,000     $ 12,000