SUPPLEMENTAL CASH FLOW INFORMATION - Schedule of Other Cash Flow Information (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Other Significant Noncash Transactions [Line Items] | ||||
| Capital expenditures, not yet paid | $ 16,552 | $ 1,835 | $ 16,552 | $ 1,835 |
| Shares issued in relation to Offtake settlement | 0 | 0 | 4,800 | 0 |
| 2023 Convertible Debentures | ||||
| Other Significant Noncash Transactions [Line Items] | ||||
| Shares issued in relation to 2023 Convertible Debentures interest | 0 | 0 | 13,384 | 0 |
| Interest paid - Orion Convertible Loan | 0 | 0 | 5,295 | 0 |
| Orion Convertible Loan | ||||
| Other Significant Noncash Transactions [Line Items] | ||||
| Shares issued in relation to Orion Convertible Loan repayment | 0 | 0 | 5,250 | 0 |
| Interest paid - Orion Convertible Loan | $ 0 | $ 0 | $ 20,403 | $ 0 |