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ADDITIONAL BALANCE SHEET DETAIL - Schedule of Accrued Expenses and other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Payables and Accruals [Abstract]
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	0	7,204
Settlement royalties liability, current portion	12,516	5,924
Clinical trial costs	1,188	1,885
Restructuring costs, current portion	0	489
Payments due to Q32	5,000	0
Other	4,488	3,840
Total accrued expenses and other current liabilities	$ 121,716	$ 63,460
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Total accrued expenses and other current liabilities	Total accrued expenses and other current liabilities

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Accrued clinical expenses current.

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Accrued Manufacturing Costs, Current

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Accrued product revenue allowances current.

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Accrued Product Revenue Provisions Reserves, Current

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Long-Term Purchase Commitment, Termination Fee, Current

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Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for royalties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer.

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Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

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