CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	9 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
CASH (USED IN) PROVIDED BY: OPERATING ACTIVITIES
Net loss for the period	$ (16,785,878)	$ (20,329,907)
Adjustments to reconcile net loss to net cash from operating activities
Stock-based compensation	809,627	2,734,675
Depletion, depreciation, amortization and accretion	2,064,954	1,526,110
(Gain) loss on disposition of assets	(4,249)	501
Loss on fair value of convertible debentures	0	49,681
Loss on settlement of convertible debentures	0	312,207
Gain on settlement of accounts payable	(10,909)	(144,285)
Loss on settlement of asset retirement obligations	32,389	0
Changes in operating assets and liabilities
Accounts and interest receivable	204,329	(88,508)
Inventories	638,939	(1,505,455)
Prepaid expenses and deposits	(172,454)	(317,349)
Accounts payable and accrued liabilities	(1,800,132)	(150,510)
Settlement of asset retirement obligations	(112,388)	(737,130)
NET CASH FLOWS USED IN OPERATING ACTIVITIES	(15,135,772)	(18,649,970)
FINANCING ACTIVITIES
Issuance of shares for cash	43,564	21,499,668
Settlement of convertible debentures	0	(1,370,486)
Due to related parties	(22,151)	2,089
NET CASH FLOWS PROVIDED BY FINANCING ACTIVITIES	21,413	20,131,271
INVESTING ACTIVITIES
Investment in mineral rights and properties	(271,833)	(4,139,357)
Purchase of property, plant and equipment	(156,432)	(947,560)
Proceeds from disposition of assets	5,000	0
Reclamation deposits	(497,119)	(917,836)
NET CASH FLOWS USED IN INVESTING ACTIVITIES	(920,384)	(6,004,753)
NET CASH FLOWS	(16,034,743)	(4,523,452)
CASH AND CASH EQUIVALENTS, BEGINNING OF PERIOD	25,015,284	30,724,051
CASH AND CASH EQUIVALENTS, END OF PERIOD	$ 8,980,541	$ 26,200,599