Property, Plant and Equipment - Construction in progress (Details) - USD ($) $ in Thousands |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Property, Plant and Equipment | ||
| Construction in progress | $ 5,485 | $ 5,141 |
| Continuous electrolyte pilot manufacturing line | ||
| Property, Plant and Equipment | ||
| Construction in progress | 3,458 | 1,194 |
| Cell safety abuse lab | ||
| Property, Plant and Equipment | ||
| Construction in progress | 18 | 835 |
| EIC | ||
| Property, Plant and Equipment | ||
| Construction in progress | 286 | 1,292 |
| Other capital projects | ||
| Property, Plant and Equipment | ||
| Construction in progress | $ 1,723 | $ 1,820 |