Intangible assets (Details) - USD ($)	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Indefinite-lived Intangible Assets (Excluding Goodwill)	$ 0	$ 605,006
Finite-Lived Intangible Assets, Net	122,050	141,700
Licensing Agreements [Member]
Amortized Intangible Assets Licenses	(76,950)	(57,300)
Finite-Lived Intangible Assets, Net	122,050	141,700
Finite-Lived Intangible Asset, Expected Amortization, after Year Five	23,800
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
Finite-Lived Intangible Asset, Expected Amortization, Year Two	20,000
Finite-Lived Intangible Assets, Amortization Expense, Rolling after Year Five	$ 19,650
Licensing Agreements [Member] | Maximum [Member]
Finite-Lived Intangible Assets, Amortization Method	P10Y