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DEBT (Details) - USD ($)
1 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Mar. 02, 2022
Jun. 25, 2020
Aug. 10, 2018
Jun. 30, 2020
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
LONG-TERM DEBT                          
Sale of flow-through shares             $ 14,400,000         $ 10,785,000  
Term Loan                          
LONG-TERM DEBT                          
Working capital covenant                   $ 10,000,000.0      
Term Loan | Chairman and Chief Executive Officer [Member]                          
LONG-TERM DEBT                          
Face amount       $ 50,000,000.0         $ 50,000,000.0   $ 50,000,000.0    
Term of debt instrument                 3 years        
Stated interest rate (as a percent)                 9.75%        
Amended loan agreement                          
LONG-TERM DEBT                          
Face amount           $ 50,000,000.0   $ 50,000,000.0          
Extension term for repayment of debt           18 months   2 years          
Term loan retirement period           18 months   11 months          
Principal repayments           $ 2,000,000.0   $ 2,000,000.0          
Final payment           12,000,000.0   $ 26,000,000.0          
Working capital covenant $ 10,000,000 $ 7,000,000.0 $ 5,000,000.0 $ 10,000,000 $ 7,000,000.0 5,000,000.0         10,000,000.0   $ 2,500,000
Shares issued as bonus interest               2,091,700          
Sale of flow-through shares               $ 1,875,000     $ 500,000    
Commercial Paper | Company Controlled by Mcewen                          
LONG-TERM DEBT                          
Due to Related Parties           $ 15,000,000.0              
Related Party Transaction, Interest Rate           8.00%