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Stock Purchase Warrants (Tables)
6 Months Ended
Jun. 30, 2014
Schedule of Stockholders' Equity Note, Warrants or Rights, Activity [Table Text Block]
            Weighted Average  
      Number     Exercise Price  
          $    
  Balance December 31, 2013   7,875,000     1.96  
  Expired   (2,000,000 )   3.00  
  Exercised   (125,000 )   1.60  
  Balance June 30, 2014   5,750,000     1.60  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
  Number of Warrants   Exercise Price     Expiry Date  
      $        
              1,600,000   1.60     December 5, 2015  
              4,150,000   1.60     March 5, 2016