CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($)	3 Months Ended
	Oct. 31, 2017	Oct. 31, 2016
COSTS AND EXPENSES
Mineral property expenditures	$ 1,676,700	$ 890,118
General and administrative	2,254,962	2,282,238
Depreciation, amortization and accretion	90,335	151,352
Impairment loss on mineral properties	0	143,168
Inventory write-down	0	60,694
Total Operating Expenses	4,021,997	3,527,570
LOSS FROM OPERATIONS	(4,021,997)	(3,527,570)
OTHER INCOME (EXPENSES)
Interest income	62,982	4,163
Interest expenses and finance costs	(740,292)	(738,103)
Other income	25,490	0
Share of gain from equity-accounted investment	108,789	0
Total Non-Operating Income Expense	(543,031)	(733,940)
LOSS BEFORE INCOME TAXES	(4,565,028)	(4,261,510)
DEFERRED INCOME TAX BENEFIT	9,188	8,816
NET LOSS FOR THE PERIOD	(4,555,840)	(4,252,694)
OTHER COMPREHENSIVE INCOME (LOSS), NET OF INCOME TAXES	383	(40)
TOTAL COMPREHENSIVE LOSS FOR THE PERIOD	$ (4,555,457)	$ (4,252,734)
NET LOSS PER SHARE, BASIC AND DILUTED	$ (0.03)	$ (0.04)
WEIGHTED AVERAGE NUMBER OF SHARES OUTSTANDING, BASIC AND DILUTED	154,133,517	117,099,921