ASSET RETIREMENT OBLIGATIONS (Details Textual) - USD ($)	12 Months Ended
Jul. 31, 2017	Jul. 31, 2016
Asset Retirement Obligations [Line Items]
Asset Retirement Obligation, Revision of Estimate	$ (344,385)
Asset Retirement Obligations, Noncurrent	3,729,902	$ 3,746,464
Palangana Mine [Member]
Asset Retirement Obligations [Line Items]
Asset Retirement Obligation, Period Increase (Decrease), Total	(344,385)	(452,505)
Asset Retirement Obligation, Revision of Estimate	157,130	144,107
Asset Retirement Obligations, Noncurrent	$ 187,255	$ 308,398

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- Definition

Amount of increase (decrease) in asset retirement obligations.

+ References

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- Definition

Amount of increase (decrease) in the asset retirement obligation from changes in the amount or timing of the estimated cash flows associated with the settlement of the obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)(4)
-URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 20
-Section 35
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=6392603&loc=d3e7123-110846

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- Definition

Noncurrent portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

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