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Cash, Cash Equivalents and Marketable Securities
 9 Months Ended
Sep. 30, 2024
Cash and Cash Equivalents [Abstract]  
Cash, Cash Equivalents and Marketable Securities Cash, Cash Equivalents and Marketable Securities
The Company held restricted cash of $5.0 million as of September 30, 2024 as collateral to its corporate credit card program. The Company had no restricted cash as of December 31, 2023.
A summary of cash, cash equivalents and available-for-sale marketable securities held by the Company as of September 30, 2024 and December 31, 2023 is as follows (in thousands):
September 30, 2024
Cost
Unrealized
gains
Unrealized
losses
Fair
value
Cash and cash equivalents:
Cash (Level 1)$25,242 $— $— $25,242 
Money market funds (Level 1)86,060 — — 86,060 
U.S. government and government sponsored entities due within 3 months (Level 1)67,541 — — 67,541 
Corporate debt securities due within 3 months of date of purchase (Level 2)
58,841 — — 58,841 
Total cash and cash equivalents237,684 — — 237,684 
Marketable securities:
Corporate debt securities due within 1 year of date of purchase (Level 2)
436,277 573 (25)436,825 
U.S. government and government sponsored entities due within 1 year of date of purchase (Level 2)
297,160 411 (7)297,564 
U.S. government and government sponsored entities due within 1 to 2 years of date of purchase (Level 2)31,235 320 (1)31,554 
Total cash, cash equivalents, restricted cash, and marketable securities$1,002,356 $1,304 $(33)$1,003,627 
December 31, 2023
Cost
Unrealized
gains
Unrealized
losses
Fair
value
Cash and cash equivalents:
Cash (Level 1)$2,729 $— $— $2,729 
Money market funds (Level 1)78,555 — — 78,555 
US government and government sponsored entities (Level 1)
14,967 — — 14,967 
Corporate debt securities due within 3 months of date of purchase (Level 2)
3,664 — — 3,664 
Total cash and cash equivalents99,915 — — 99,915 
Marketable securities:
Corporate debt securities due within 1 year of date of purchase (Level 2)382,028 195 (7)382,216 
US government and government sponsored entities due within 1 year of date of purchase (Level 2)
150,743 280 (1)151,022 
Corporate debt securities due within 1 to 2 years of date of purchase (Level 2)
977 1 — 978 
Total cash, cash equivalents and marketable securities$633,663 $476 $(8)$634,131