Mineral Properties, Plant and Equipment, Net - Additional Information (Details) - Thacker Pass [Member] - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Restricted Stock Units (RSUs) [Member] | ||||
| Property, Plant and Equipment [Line Items] | ||||
| Stock-based compensation, capitalized | $ 281 | $ 644 | $ 626 | $ 1,190 |
| Performance Share Units (PSUs) [Member] | ||||
| Property, Plant and Equipment [Line Items] | ||||
| Stock-based compensation, capitalized | $ 59 | $ 119 | ||