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Schedule of Company's Deferred Tax Asset (Liability) (Details) - United States - USD ($)	Jun. 30, 2018	Jun. 30, 2017
Operating Loss Carryforwards [Line Items]
Mineral properties	$ 166,476	$ (248,008)
Asset retirement obligation	225,236	428,572
Stock options	264,898	404,628
Net operating losses	8,042,088	9,826,149
Gross deferred tax assets	8,698,698	10,411,341
Valuation allowance	$ (8,698,698)	$ (10,411,341)

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Deferred tax assets mineral properties.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from asset retirement obligations. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset.

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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