CAPITAL STOCK (Details) - USD ($)	3 Months Ended				6 Months Ended
	Jan. 31, 2018		Oct. 31, 2017		Jan. 31, 2018		Jul. 31, 2017
Share Transactions [Line Items]
Stock-based compensation Common stock issued for consulting services					$ 284,306
Mineral Property					61,820
Common stock Issued for Reno Creek Acquisition					$ 20,332,617
Reimbursable Expenses for Reno Creek Acquisition (in shares)					353,160
Reimbursable Expenses for Reno Creek Acquisition					$ 483,829
Options Exercised					103,300
Shares Issued Under 2017 Stock Incentive Plan					488,854
Settlement of Current Liabilities					$ 141,678
Issuance Value [Member]
Share Transactions [Line Items]
Stock-based compensation Common stock issued for consulting services	$ 91,903
Mineral Property			$ 61,820
Common stock Issued for Reno Creek Acquisition			20,332,617
Reimbursable Expenses for Reno Creek Acquisition			483,829
Consulting Services			192,403
Options Exercised	163,534		31,860
Shares Issued Under 2017 Stock Incentive Plan	$ 341,667		785,329
Settlement of Current Liabilities			$ 141,678
Common Stock [Member]
Share Transactions [Line Items]
Balance (in shares)	155,954,055		139,815,124		139,815,124
Mineral Property (in shares)			46,134
Common stock Issued for Reno Creek Acquisition (in shares)			14,852,450
Reimbursable Expenses for Reno Creek Acquisition (in shares)			353,160
Consulting Services (in shares)	55,909		124,469
Options Exercised (in shares)	184,416	[1]	66,516	[2]
Shares Issued Under 2017 Stock Incentive Plan (in shares)	258,444		591,496
Settlement of Current Liabilities (in shares)			104,706
Balance (in shares)	156,452,824		155,954,055		156,452,824
Minimum [Member] | Mineral Property [Member]
Share Transactions [Line Items]
Value per Share							$ 1.34
Maximum [Member] | Mineral Property [Member]
Share Transactions [Line Items]
Value per Share							1.34
Settlement of Current Liabilities [Member] | Minimum [Member]
Share Transactions [Line Items]
Value per Share							1.35
Settlement of Current Liabilities [Member] | Maximum [Member]
Share Transactions [Line Items]
Value per Share							1.35
Consulting Services [Member] | Minimum [Member]
Share Transactions [Line Items]
Value per Share	$ 1.49				$ 1.49		1.19
Consulting Services [Member] | Maximum [Member]
Share Transactions [Line Items]
Value per Share	1.84				1.84		1.73
Options Exercised [Member] | Minimum [Member]
Share Transactions [Line Items]
Value per Share	0.45	[1]			0.45	[1]	0.45	[2]
Options Exercised [Member] | Maximum [Member]
Share Transactions [Line Items]
Value per Share	1.32	[1]			1.32	[1]	0.93	[2]
Reno Creek Acquisition [Member] | Minimum [Member]
Share Transactions [Line Items]
Value per Share							1.30
Reno Creek Acquisition [Member] | Maximum [Member]
Share Transactions [Line Items]
Value per Share							1.37
Reimbursable Expenses for Reno Creek Acquisition [Member] | Minimum [Member]
Share Transactions [Line Items]
Value per Share							1.37
Reimbursable Expenses for Reno Creek Acquisition [Member] | Maximum [Member]
Share Transactions [Line Items]
Value per Share							1.37
Shares Issued Under 2017 Stock Incentive Plan [Member] | Minimum [Member]
Share Transactions [Line Items]
Value per Share	1.06				1.06		1.28
Shares Issued Under 2017 Stock Incentive Plan [Member] | Maximum [Member]
Share Transactions [Line Items]
Value per Share	$ 1.77				$ 1.77		$ 1.60

[1] 171,250 stock options were exercised on a forfeiture basis, resulting in 74,416 net shares being issued.

[2] 111,250 stock options were exercised on a forfeiture basis, resulting in 66,516 net shares being issued.