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ADDITIONAL BALANCE SHEET DETAIL - Summary of Accrued Expenses and other Current Liabilities (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Payables and Accruals [Abstract] |  |
Product revenue allowances | $ 27,451 | $ 15,727
Product return reserves, current portion | 5,186 | 5,295
Clinical trial costs | 773 | 1,885
Compensation and related benefits | 5,673 | 9,194
Operating lease liabilities, current portion | $ 5,514 | $ 5,400
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] | Total accrued expenses and other current liabilities | Total accrued expenses and other current liabilities
Royalties due to Panion & BF Biotech, Inc. | $ 3,267 | $ 3,543
Professional fees | 1,035 | 1,452
Accrued manufacturing costs | 1,580 | 1,468
Restructuring costs | 251 | 489
BioVectra, Inc. termination fees | 4,894 | 7,204
Liability related to sale of future royalties, current portion | 2,048 | 2,039
Settlement royalties liability, current portion | 10,577 | 5,924
Other | 3,088 | 3,840
Total accrued expenses and other current liabilities | $ 71,337 | $ 63,460

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