CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	6 Months Ended
	Jan. 31, 2016	Jan. 31, 2015
CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES
Net loss for the period	$ (9,873,539)	$ (12,601,767)
Adjustments to reconcile net loss to cash flows in operating activities
Stock-based compensation	1,688,791	3,310,666
Depreciation, amortization and accretion	475,085	1,066,726
Amortization of long-term debt discount	683,390	658,404
Re-valuation of asset retirement obligations	(184,381)	0
Impairment loss on mineral properties	86,535	0
Loss on disposition of assets	2,186	2,898
Deferred income tax benefit	(14,530)	(23,630)
Changes in operating assets and liabilities
Inventories	0	(162,035)
Prepaid expenses and deposits	(168,373)	(91,660)
Other current assets	(682)	402
Accounts payable and accrued liabilities	(635,725)	(955,612)
NET CASH FLOWS USED IN OPERATING ACTIVITIES	(7,941,243)	(8,795,608)
CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES
Shares issuance for cash, net of issuance costs	225,115	431,590
Due to related parties	47,465	(6,317)
NET CASH FLOWS PROVIDED BY FINANCING ACTIVITIES	272,580	425,273
CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES
Investment in mineral rights and properties	0	(73,624)
Purchase of property, plant and equipment	(18,439)	(5,993)
Proceeds from disposition of assets	818	0
Cash proceeds from the release of reclamation deposits	0	5,663,158
Payment of collateral for surety bonds	0	(1,690,208)
Decrease in reclamation deposits	(1)	(346)
NET CASH FLOWS USED IN (PROVIDED BY) INVESTING ACTIVITIES	(17,622)	3,892,987
NET CASH FLOWS	(7,686,285)	(4,477,348)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	10,092,408	8,839,892
CASH AND CASH EQUIVALENTS, END OF PERIOD	$ 2,406,123	$ 4,362,544