CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($)	12 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2015
SALES	$ 0	$ 0	$ 3,080,000
COSTS AND EXPENSES
Cost of sales	0	0	2,326,674
Inventory write-down	60,694	0	0
Mineral property expenditures	4,120,388	4,061,159	5,706,080
General and administrative	10,241,681	9,297,746	13,230,840
Depreciation, amortization and accretion	497,728	875,724	1,802,443
Impairment loss on mineral properties	297,942	97,114	349,805
Total Operating Expenses	15,218,433	14,331,743	23,415,842
LOSS FROM OPERATIONS	(15,218,433)	(14,331,743)	(20,335,842)
OTHER INCOME (EXPENSES)
Interest income	137,863	24,177	12,797
Interest expenses and finance costs	(2,914,862)	(3,005,391)	(3,071,235)
Loss on disposition of assets	(1,055)	(2,186)	(38)
Loss on settlement of liabilities	(49,002)	(46,968)	0
Realized loss on available-for-sale securities	0	0	(3,023)
Other income	40,078	0	0
Total Non-Operating Income Expense	(2,786,978)	(3,030,368)	(3,061,499)
LOSS BEFORE INCOME TAXES	(18,005,411)	(17,362,111)	(23,397,341)
DEFERRED INCOME TAX BENEFIT	34,355	32,239	35,413
NET LOSS FOR THE YEAR	(17,971,056)	(17,329,872)	(23,361,928)
OTHER COMPREHENSIVE INCOME (LOSS),NET OF INCOME TAXES	28	(99)	(1,092)
TOTAL COMPREHENSIVE LOSS FOR THE YEAR	$ (17,971,028)	$ (17,329,971)	$ (23,363,020)
NET LOSS PER SHARE, BASIC AND DILUTED	$ (0.14)	$ (0.16)	$ (0.25)
WEIGHTED AVERAGE NUMBER OF SHARES OUTSTANDING, BASIC AND DILUTED	128,244,751	106,086,782	92,397,547