CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($)	3 Months Ended		6 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2018	Jan. 31, 2017
COSTS AND EXPENSES
Mineral property expenditures	$ 980,215	$ 1,067,446	$ 2,656,915	$ 1,957,564
General and administrative	2,864,165	2,241,247	5,119,127	4,523,485
Depreciation, amortization and accretion	89,437	128,255	179,772	279,607
Impairment loss on mineral properties	0	154,774	0	297,942
Inventory write-down	0	0	0	60,694
Total Operating Expenses	3,933,817	3,591,722	7,955,814	7,119,292
LOSS FROM OPERATIONS	(3,933,817)	(3,591,722)	(7,955,814)	(7,119,292)
OTHER INCOME (EXPENSES)
Interest income	86,886	1,267	149,868	5,430
Other income	10,344	0	35,834	0
Interest expenses and finance costs	(756,293)	(749,419)	(1,496,585)	(1,487,522)
Share of (loss) gain from equity-accounted investment	(7,556)	0	101,233	0
Loss on disposition of assets	(474)	(1,055)	(474)	(1,055)
Total Non-Operating Income Expense	(667,093)	(749,207)	(1,210,124)	(1,483,147)
LOSS BEFORE INCOME TAXES	(4,600,910)	(4,340,929)	(9,165,938)	(8,602,439)
DEFERRED TAX BENEFITS	247,097	8,560	256,285	17,376
NET LOSS FOR THE PERIOD	(4,353,813)	(4,332,369)	(8,909,653)	(8,585,063)
OTHER COMPREHENSIVE INCOME (LOSS), NET OF INCOME TAXES	(247)	42	136	2
TOTAL COMPREHENSIVE LOSS FOR THE PERIOD	$ (4,354,060)	$ (4,332,327)	$ (8,909,517)	$ (8,585,061)
NET LOSS PER SHARE, BASIC AND DILUTED	$ (0.03)	$ (0.04)	$ (0.06)	$ (0.07)
WEIGHTED AVERAGE NUMBER OF SHARES OUTSTANDING, BASIC AND DILUTED	156,207,557	119,891,769	155,170,537	118,495,845