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EQUITY INVESTMENTS IN UNCONSOLIDATED AFFILIATES - Narrative (Details)
$ in Millions, $ in Millions
3 Months Ended
Aug. 31, 2021
USD ($)
Aug. 30, 2021
USD ($)
Aug. 30, 2021
CAD ($)
Aug. 20, 2021
USD ($)
Aug. 20, 2021
AUD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Schedule of Equity Method Investments [Line Items]              
Purchase of equity investments in unconsolidated affiliates           $ 42,582,106 $ 0
North American Lithium Inc.              
Schedule of Equity Method Investments [Line Items]              
Asset acquisition, consideration transferred   $ 19,500,000 $ 24.5        
Sayona Mining Limited | North American Lithium Inc.              
Schedule of Equity Method Investments [Line Items]              
Asset acquisition, consideration transferred   58,300,000 73.4        
Sayona Quebec Inc. | North American Lithium Inc.              
Schedule of Equity Method Investments [Line Items]              
Asset acquisition, consideration transferred   $ 77,800,000 $ 97.9        
IronRidge Resources Limited              
Schedule of Equity Method Investments [Line Items]              
Equity interest, ownership percentage 10.00%            
Purchase of equity investments in unconsolidated affiliates $ 15,949,288         15,949,288  
Equity investments, supply agreement, percentage 50.00%            
Equity investments, additional expected ownership percentage to acquire 50.00%            
Equity investments, additional expected ownership percentage to acquire, cost $ 87,000,000            
Sayona Quebec Inc.              
Schedule of Equity Method Investments [Line Items]              
Equity interest, ownership percentage   25.00% 25.00%        
Purchase of equity investments in unconsolidated affiliates           $ 19,449,545  
Sayona Quebec Inc. | Sayona Mining Limited              
Schedule of Equity Method Investments [Line Items]              
Equity interest, ownership percentage   75.00% 75.00%        
Sayona Mining Limited              
Schedule of Equity Method Investments [Line Items]              
Equity interest, ownership percentage           19.00%  
Purchase of equity investments in unconsolidated affiliates       $ 7,000,000 $ 9.8 $ 7,183,273