v3.23.3
FAIR VALUE MEASUREMENTS - Fair value on a recurring basis (Details)
$ in Millions
Sep. 30, 2023
USD ($)
Y
$ / shares
Price Volatility Rate | Investment in Hycroft Mining Holding Corporation Warrants  
Other long-term assets:  
Estimates to value Warrants 114.9
Discount yield | Investment in Hycroft Mining Holding Corporation Warrants  
Other long-term assets:  
Estimates to value Warrants 4.8
Expected Term | Investment in Hycroft Mining Holding Corporation Warrants  
Other long-term assets:  
Estimates to value Warrants | Y 3.5
Exercise Price | Investment in Hycroft Mining Holding Corporation Warrants  
Other long-term assets:  
Estimates to value Warrants | $ / shares 1.068
Recurring basis  
Other long-term assets:  
Total assets at fair value $ 10.8
Recurring basis | Investment in Hycroft Mining Holding Corporation Warrants  
Other long-term assets:  
Investments measured at net asset value 3.8
Recurring basis | Hycroft  
Other long-term assets:  
The company's recorded investment 7.0
Recurring basis | Quoted prices in active market (Level 1)  
Other long-term assets:  
Total assets at fair value 7.0
Recurring basis | Quoted prices in active market (Level 1) | Hycroft  
Other long-term assets:  
The company's recorded investment 7.0
Recurring basis | Significant unobservable inputs (Level 3)  
Other long-term assets:  
Total assets at fair value 3.8
Recurring basis | Significant unobservable inputs (Level 3) | Investment in Hycroft Mining Holding Corporation Warrants  
Other long-term assets:  
Investments measured at net asset value $ 3.8