Prepaid Expenses and Project Deposits - Narrative (Details) - USD ($) $ in Thousands |
Mar. 31, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Other Commitments [Line Items] | ||
| Project deposits | $ 2,400 | $ 0 |
| Pilot HREE Metallization | ||
| Other Commitments [Line Items] | ||
| Project deposits | 1,400 | |
| Commercial HREE Metallization | ||
| Other Commitments [Line Items] | ||
| Project deposits | $ 1,000 |