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NATURE OF OPERATIONS AND GOING CONCERN (Tables)
6 Months Ended
Feb. 28, 2019
Statements [Line Items]  
Disclosure of subsidiaries [Table Text Block]
   Place ofProportion of ownership interest
   incorporationand voting power held
   andFebruary 28,August 31,
 Name of subsidiaryPrincipal activityoperation20192018
      
 Platinum Group Metals (RSA) (Pty) Ltd.ExplorationSouth Africa100%100%
 Mnombo Wethu Consultants (Pty) Limited.1ExplorationSouth Africa49.9%49.9%
 Waterberg JV Resources (Pty) Ltd.ExplorationSouth Africa37.05%37.05%