Fair Values of Financial Instruments - Summary of Carrying Amount and Fair Values (Parenthetical) (Details) |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Discounted cash flow with a weighted average discount rate | 27.00% | 26.80% |
| Convertible Debt host [Member] | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Discount rate | 26.40% | 26.10% |
| DOE loan [Member] | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Discount rate | 9.90% | 8.00% |
| Fair Value, Inputs, Level 3 [Member] | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Discounted cash flow with a weighted average discount rate | 26.40% | 26.10% |