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Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2024
Fair Value Disclosures [Abstract]  
Fair Value Measurements, Recurring and Nonrecurring
The following tables present information about financial instruments measured at fair value on a recurring basis (in thousands):
September 30, 2024
TotalLevel 1Level 2Level 3
Assets:
Cash equivalents$338,948 $338,948 $— $— 
Total assets$338,948 $338,948 $— $— 
December 31, 2023
TotalLevel 1Level 2Level 3
Assets:
Cash equivalents$57,890 $57,890 $— $— 
Total assets$57,890 $57,890 $— $— 
Liabilities:
Convertible notes derivative liability$25,400 $— $— $25,400 
Total liabilities$25,400 $— $— $25,400 
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation
The following table summarizes the activity related to the fair value of the convertible notes derivative liability (in thousands):
Three months ended September 30,Nine months ended September 30,
2024202320242023
Fair value at beginning of period$— $22,100 $25,400 $20,400 
Change in fair value— 1,500 3,085 3,200 
Settlement of derivative liability— — (28,485)— 
Fair value at end of period$— $23,600 $— $23,600