Intangible assets (Details) - USD ($)	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Indefinite-lived Intangible Assets (Excluding Goodwill)	$ 605,006	$ 605,006
Finite-Lived Intangible Assets, Net	141,700	161,350
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	0	400
Payments to Acquire Other Productive Assets	0	12,500
Parent [Member]
Amortized Intangible Assets Licenses	91,000
Licensing Agreements [Member]
Amortized Intangible Assets Licenses	(57,300)	(37,650)
Finite-Lived Intangible Assets, Net	141,700	161,350
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year		20,000
finite intangible assets, net, amortization expense, next twelve-month to year five		20,000
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	42,000
Finite-Lived Intangible Assets, Gross	199,000	199,000
Finite-lived tangible assets, accumulated impairment	0	0
Finite-lived intangible assets, net of impairment	$ 199,000	$ 199,000
Licensing Agreements [Member] | Maximum [Member]
Finite-Lived Intangible Asset, Useful Life		10 years