Going concern (Details) - USD ($)	Jun. 30, 2020	Jun. 30, 2019
Going concern [Abstract]
Retained Earnings (Accumulated Deficit)	$ (68,842,499)	$ (68,192,219)

The cumulative amount of the reporting entity's undistributed earnings or deficit.

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Name:	us-gaap_RetainedEarningsAccumulatedDeficit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant