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Patents (Details 1) - USD ($)
3 Months Ended 6 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]        
Patent amortization expense $ 7,000 $ 6,000 $ 13,000 $ 12,000