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Prepaid Expenses and Other Assets (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Prepaid insurance $ 192 $ 747
Prepaid software licenses and maintenance 574 691
Foreign R&D credit refund 765 500
Prepaid research and development expenses 13,098 13,640
Interest receivable 3,155 3,337
Sublease assets 852 1,471
Other prepaid expenses 3,037 231
Total prepaid expenses and other assets 21,673 20,617
Less long-term portion 6,851 6,818
Total prepaid expenses and other assets, current $ 14,822 $ 13,799