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Accrued Expenses and Other Current Liabilities
9 Months Ended
Sep. 30, 2023
Accrued Liabilities, Current [Abstract]  
Accrued Expenses and Other Current Liabilities Accrued Expenses and Other Current liabilities
Accrued expenses consisted of the following (in thousands):
September 30,
2023
December 31,
2022
Accrued property and equipment purchases$29,123 $24,797 
Accrued research and development costs15,726 17,736 
Accrued professional fees7,951 8,112 
Other accrued expenses10,610 12,446 
Total accrued expenses and other current liabilities$63,410 $63,091