CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	6 Months Ended
	Jan. 31, 2017	Jan. 31, 2016
CASH PROVIDED BY (USED IN): OPERATING ACTIVITIES
Net loss for the period	$ (8,585,063)	$ (9,873,539)
Adjustments to reconcile net loss to cash flows in operating activities
Stock-based compensation	1,814,301	1,688,791
Depreciation, amortization and accretion	279,607	475,085
Amortization of long-term debt discount	601,568	683,390
Inventory write-down	60,694	0
Re-valuation of asset retirement obligations	0	(184,381)
Impairment loss on mineral properties	297,942	86,535
Loss on disposition of assets	1,055	2,186
Deferred income tax benefit	(17,376)	(14,530)
Changes in operating assets and liabilities
Inventories	2,960	0
Prepaid expenses and deposits	(395,109)	(168,373)
Other current assets	17,218	(682)
Accounts payable and accrued liabilities	607,826	(635,725)
NET CASH FLOWS USED IN OPERATING ACTIVITIES	(5,314,377)	(7,941,243)
FINANCING ACTIVITIES
Shares issuance for cash, net of issuance costs	25,899,128	225,115
Due to related parties	11,528	47,465
NET CASH FLOWS PROVIDED BY (USED IN) FINANCING ACTIVITIES	25,910,656	272,580
INVESTING ACTIVITIES
Purchase of property, plant and equipment	(3,439)	(18,439)
Proceeds from disposition of assets	0	818
Decrease in reclamation deposits	0	(1)
NET CASH FLOWS USED IN INVESTING ACTIVITIES	(3,439)	(17,622)
NET CASH FLOWS	20,592,840	(7,686,285)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	7,142,571	10,092,408
CASH AND CASH EQUIVALENTS, END OF PERIOD	$ 27,735,411	$ 2,406,123