CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
CASH (USED IN) PROVIDED BY: OPERATING ACTIVITIES
Net loss for the year	$ (25,975,107)	$ (21,863,091)	$ (25,083,720)
Adjustments to reconcile net loss to net cash from operating activities
Stock-based compensation	1,309,450	1,015,787	2,909,503
Depletion, depreciation, amortization and accretion	4,048,870	2,778,624	2,219,924
Impairment loss on mineral properties	653,224	0	0
(Gain) loss on disposition of assets	2,553	(4,249)	(6,999)
Loss on fair value of convertible debentures	0	0	49,681
Loss on settlement of convertible debentures	0	0	312,207
Loss on fair value of variable share forward contract	331,130	0	0
Loss (gain) on settlement of current liabilities	20,581	(10,909)	(221,292)
(Gain) Loss on settlement of asset retirement obligations	(9,831)	32,389	444,448
Realized loss on available-for-sale securities	0	45,750	0
Deferred income tax benefit	(69,709)	(10,753)	(61,788)
Changes in operating assets and liabilities
Accounts and interest receivable	30,523	228,000	(166,626)
Inventories	(700,679)	900,381	899,847
Prepaid expenses and deposits	426,549	(380,766)	(433,293)
Accounts payable and accrued liabilities	(1,322,106)	(1,899,859)	993,865
Settlement of asset retirement obligations	(13,551)	(142,305)	(1,064,220)
NET CASH FLOWS USED IN OPERATING ACTIVITIES	(21,268,103)	(19,311,001)	(19,208,463)
FINANCING ACTIVITIES
Shares issuance for cash, net of issuance costs	6,559,523	46,464	21,522,863
Net proceeds from debt financing	9,972,944	9,405,946	0
Debt and equity financing costs	(635,746)	0	0
Settlement of convertible debentures	0	0	(1,370,486)
Due to related parties	1,663	(37,872)	39,156
NET CASH FLOWS PROVIDED BY FINANCING ACTIVITIES	15,898,384	9,414,538	20,191,533
INVESTING ACTIVITIES
Investment in mineral rights and properties	(161,800)	(275,030)	(4,444,919)
Purchase of property, plant and equipment	(163,276)	(179,115)	(1,321,678)
Proceeds from disposition of assets	600	5,000	7,500
Decrease (increase) in reclamation deposits	362,280	(497,869)	(932,740)
NET CASH FLOWS PROVIDED BY (USED IN) INVESTING ACTIVITIES	37,804	(947,014)	(6,691,837)
NET CASH FLOWS	(5,331,915)	(10,843,477)	(5,708,767)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	14,171,807	25,015,284	30,724,051
CASH AND CASH EQUIVALENTS, END OF YEAR	$ 8,839,892	$ 14,171,807	$ 25,015,284