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Exploration and Evaluation Expenditures - National Chloride California Property (Details)
 9 Months Ended
May 24, 2022
USD ($)
shares
May 24, 2021
USD ($)
shares
May 24, 2020
USD ($)
shares
May 24, 2019
USD ($)
shares
May 24, 2018
USD ($)
shares
Nov. 24, 2017
USD ($)
Sep. 01, 2017
CAD ($)
a
Sep. 01, 2017
USD ($)
a
May 24, 2017
shares
May 01, 2017
USD ($)
a
shares
Mar. 31, 2023
CAD ($)
Mar. 31, 2022
CAD ($)
Exploration and Evaluation Expenditures                        
Purchase of exploration and evaluation assets                     $ 15,806,296 $ 2,069,120
Lease property | National Chloride                        
Exploration and Evaluation Expenditures                        
Area of lease property (Acre) | a                   12,290    
Purchase of exploration and evaluation assets   $ 100,000 $ 100,000 $ 100,000 $ 100,000 $ 50,000 $ 56,873 $ 44,805   $ 25,000    
Amount required to be paid under terms of agreement                   $ 1,825,000    
Common shares issuable under terms of agreement (in shares) | shares                   1,700,000    
Number of common shares issued for exploration and evaluation assets (in shares) | shares 200,000 200,000 200,000 200,000 200,000       100,000 100,000    
Shares issuable upon completion of pre-feasibility study (in shares) | shares                   500,000    
Net smelter return royalty (as a percent)                   2.00%    
Minimum royalty                   $ 500,000    
Additional area of lease property | a             6,000 6,000        
Lease property | National Chloride | Successful completion of a pre-feasibility study                        
Exploration and Evaluation Expenditures                        
Amount payable upon completion of pre-feasibility study                   250,000    
Lease property | National Chloride | Successful completion of a bankable feasibility study                        
Exploration and Evaluation Expenditures                        
Purchase of exploration and evaluation assets $ 100,000                      
Lease property | National Chloride | Acquisition of property                        
Exploration and Evaluation Expenditures                        
Amount payable upon completion of feasibility study                   $ 1,000,000