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Prepaid Expenses and other assets
 6 Months Ended
Jun. 30, 2025
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Prepaid Expenses and other assets Prepaid Expenses and other assets
Prepaid expenses and other assets consisted of the following (in thousands):
June 30, 2025December 31, 2024
Research and development$— $1,715 
Collaboration receivable (Note 10)— 2,864 
Other receivables (a)579 — 
Deposits— 925 
Insurance1,628 340 
Other78 72 
$2,285 $5,916 
(a) "Other receivables" primarily consisted of equipment sales, sales and use tax refunds, and research and development tax refunds.