ASSET RETIREMENT OBLIGATIONS AND RESTRICTED CASH - Schedule of Change in Asset Retirement Obligation (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] | ||||
| Beginning balance | $ 22,195 | |||
| Accretion | $ 3,711 | $ 862 | 4,308 | $ 1,935 |
| Settlements | (2,972) | |||
| Ending balance | $ 23,531 | 23,531 | ||
| Kwale Project | ||||
| Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] | ||||
| Accretion | $ 3,100 | |||