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ADDITIONAL BALANCE SHEET DETAIL (Tables)
 3 Months Ended
Mar. 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):
DescriptionMarch 31, 2025
December 31, 2024
Prepaid manufacturing$1,221 $4,029 
Other7,917 7,321 
Total prepaid expenses and other current assets$9,138 $11,350 
Schedule of Other Long-Term Assets
Other long-term assets are as follows (in thousands):
DescriptionMarch 31, 2025
December 31, 2024
Long-term inventories$35,966 $34,953 
Restricted cash1,685 1,680 
Other690 744 
Total other long-term assets$38,341 $37,377 
Components of Accrued Expenses
Accrued expenses and other current liabilities consists of the following (in thousands): 
Description
March 31, 2025December 31, 2024
Product revenue allowances$27,451 $15,727 
Product return reserves, current portion5,186 5,295 
Clinical trial costs773 1,885 
Compensation and related benefits5,673 9,194 
Operating lease liabilities, current portion5,514 5,400 
Royalties due to Panion & BF Biotech, Inc.3,267 3,543 
Professional fees1,035 1,452 
Accrued manufacturing costs1,580 1,468 
Restructuring costs251 489 
BioVectra, Inc. termination fees4,894 7,204 
Liability related to sale of future royalties, current portion2,048 2,039 
Settlement royalties liability, current portion10,577 5,924 
Other3,088 3,840 
Total accrued expenses and other current liabilities$71,337 $63,460