Mineral Properties, Plant and Equipment, Net - Schedule of Mineral Properties, Plant and Equipment (Parenthetical) (Details) - Thacker Pass [Member] $ in Thousands |
Jun. 30, 2025
USD ($)
|
|---|---|
| Property, Plant and Equipment [Line Items] | |
| Prepaid construction costs | $ 82,353 |
| Deposits on long-lead equipment | $ 128,426 |