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NATURE OF OPERATIONS AND GOING CONCERN (Tables)
 9 Months Ended
May 31, 2019
Statements [Line Items]  
Disclosure of subsidiaries [Table Text Block]
    Place of      Proportion of ownership
    incorporation interest and voting power held
    and May 31, August 31,
Name of subsidiary Principal activity operation 2019 2018
         
Platinum Group Metals (RSA) (Pty) Ltd. Exploration South Africa 100% 100%
Mnombo Wethu Consultants (Pty) Limited.1 Exploration South Africa 49.9% 49.9%
Waterberg JV Resources (Pty) Ltd. Exploration South Africa 37.05% 37.05%
1 The Company controls and consolidates Mnombo Wethu Consultants (Pty) Limited (“Mnombo”) and Waterberg JV Resources (Pty) Ltd. for accounting purposes.