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Cash and Cash Equivalents and Investments (Tables)
9 Months Ended
Sep. 30, 2024
Cash, Cash Equivalents, and Short-Term Investments [Abstract]  
Schedule of Cash, Cash Equivalents and Short-term Investments
The fair value of cash and cash equivalents and investments held at September 30, 2024 and December 31, 2023 are as follows: 
 As of September 30, 2024
 Amortized CostGross Unrealized GainsGross Unrealized LossesEstimated Fair Value
 (in thousands)
Cash and cash equivalents$34,551 $— $— $34,551 
Securities maturing within one year:    
U.S. treasury securities188,577 279 — 188,856 
Corporate debt securities34,892 77 (7)34,962 
Total short-term investments$223,469 $356 $(7)$223,818 
Total cash and cash equivalents and investments$258,020 $356 $(7)$258,369 
 As of December 31, 2023
 Amortized CostGross Unrealized GainsGross Unrealized LossesEstimated Fair Value
  (in thousands) 
Cash and cash equivalents$22,465 $— $— $22,465 
Securities maturing within one year:    
U.S. treasury securities141,577 31 (12)141,596 
Corporate debt securities5,954 11 — 5,965 
Total short-term investments$147,531 $42 $(12)$147,561 
Total cash and cash equivalents and investments
$169,996 $42 $(12)$170,026