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ASSET RETIREMENT OBLIGATIONS (Tables)
3 Months Ended
Oct. 31, 2013
Schedule of Asset Retirement Obligation [Table Text Block]
    October 31, 2013     July 31, 2013  
Opening balance $ 4,078,080   $ 3,112,374  
Revision in estimate of asset retirement obligations   -     435,758  
Additions of asset retirement obligations   -     435,004  
Liabilities settled with cash   (12,123 )   (109,916 )
Accretion   69,231     204,860  
    4,135,187     4,078,080  
Less: current portion of asset retirement obligations   (834,609 )   (836,073 )
Long-term asset retirement obligations $ 3,300,578   $ 3,242,007  
Schedule of Undiscounted Amounts of Estimated Cash Flows [Table Text Block]
    October 31, 2013     July 31, 2013  
Undiscounted amount of estimated cash flows $ 5,963,142   $ 5,975,265  
             
Payable in years   2.5 to 12     2.5 to 12  
Inflation rate   1.56% to 2.43%     1.56% to 2.43%  
Discount rate   5.00% to 10.50%     5.00% to 10.50%  
Schedule of Undiscounted Amounts of Estimated Cash Flows, 5 Years [Table Text Block]
Undiscounted estimated cash flow for the next five years      
July 31, 2014 $ 856,373  
July 31, 2015   623,964  
July 31, 2016   598,202  
July 31, 2017   1,549,289  
July 31, 2018   -  
Remaining balance   2,335,314  
  $ 5,963,142