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ADDITIONAL BALANCE SHEET DETAIL (Tables) | 12 Months Ended
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Dec. 31, 2025
Payables and Accruals [Abstract] |
Schedule of Prepaid Expenses and Other Current Assets | Prepaid expenses and other current assets are as follows (in thousands):
|  | December 31,
Description |  | 2025 |  | 2024
Prepaid manufacturing |  | — |  |  | 4,029 |
Restricted cash |  | 1,699 |  |  | — |
Other |  | 3,771 |  |  | 7,321 |
Total prepaid expenses and other current assets |  | 5,470 |  |  | 11,350 |
Schedule of Other Long-Term Assets | Other long-term assets are as follows (in thousands):
|  | December 31,
Description |  | 2025 |  | 2024
Long-term inventories |  | $ | 59,129 |  |  | $ | 34,953 |
Restricted cash |  | — |  |  | 1,680 |
Other |  | 552 |  |  | 744 |
Total other long-term assets |  | $ | 59,681 |  |  | $ | 37,377 |
Schedule of Components of Accrued Expenses and Other Current Liabilities | Accrued expenses and other current liabilities are as follows (in thousands):
|  | December 31,
Description |  | 2025 |  | 2024
Product revenue allowances |  | $ | 7,916 |  |  | $ | 9,657 |
Product rebates |  | 64,674 |  |  | 6,070 |
Product return provisions, current portion |  | 2,375 |  |  | 5,295 |
Compensation and related benefits |  | 11,018 |  |  | 9,194 |
Operating lease liabilities, current portion |  | 3,548 |  |  | 5,400 |
Royalties due to Panion & BF Biotech, Inc. |  | 3,924 |  |  | 3,543 |
Liability related to sale of future royalties, current portion |  | 1,664 |  |  | 2,039 |
Professional fees |  | 1,597 |  |  | 1,452 |
Accrued manufacturing costs |  | 1,808 |  |  | 1,468 |
BioVectra, Inc. termination fees, current portion |  | — |  |  | 7,204 |
Settlement royalties liability, current portion |  | 12,516 |  |  | 5,924 |
Clinical trial costs |  | 1,188 |  |  | 1,885 |
Restructuring costs, current portion |  | — |  |  | 489 |
Payments due to Q32 |  | 5,000 |  |  | — |
Other |  | 4,488 |  |  | 3,840 |
Total accrued expenses and other current liabilities |  | $ | 121,716 |  |  | $ | 63,460 |

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