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ACCOUNTS PAYABLE AND ACCRUED LIABILITIES - Additional Information (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Jun. 30, 2023
Accounts Payable and Accrued Liabilities [Abstract]    
Present value of asset retirement obligation $ 30.4 $ 31.3
Undiscounted value of asset retirement obligation $ 33.9 $ 35.0