ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Payables and Accruals [Abstract]
Product revenue allowances	$ 23,834	$ 26,268
Product return reserves, current portion	3,312	7,789
Compensation and related benefits	7,204	11,481
Operating lease liabilities, current portion	$ 4,861	4,744
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Total accrued expenses and other current liabilities
Royalties	$ 3,076	3,804
Professional fees	4,648	1,886
Accrued manufacturing costs	4,156	4,310
BioVectra termination fees	5,000	0
Clinical trial costs	312	5,755
Restructuring costs	617	2,751
Other	5,644	6,989
Total accrued expenses and other current liabilities	$ 62,664	$ 75,777

Accrued clinical expenses current.

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- Definition

Accrued Manufacturing Costs, Current

+ References

No definition available.

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- Definition

Accrued product revenue allowances current.

+ References

No definition available.

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- Definition

Accrued Product Revenue Return Reserves, Current

+ References

No definition available.

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- Definition

Long-Term Purchase Commitment, Termination Fee, Current

+ References

No definition available.

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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).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.20)
-Publisher FASB
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- Definition

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).

+ References

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- Definition

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).

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
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-Name Accounting Standards Codification
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- Definition

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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- Definition

Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

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- Definition

Indicates line item in statement of financial position that includes current operating lease liability.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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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No definition available.

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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.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
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-Name Accounting Standards Codification
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