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Investments and Fair Value Measurements (Tables)
 9 Months Ended
Sep. 30, 2024
Fair Value Disclosures [Abstract]  
Schedule of Cash, Cash Equivalents, and Marketable Securities
The Company's total cash, cash equivalents and marketable securities consisted of the following:
As of September 30, 2024As of December 31, 2023
(in thousands)
Cash and cash equivalents:
Cash$18,245 $21,269 
U.S. Treasury securities49,789 52,830 
Money market funds149,480 21,166 
Commercial paper— 12,656 
Total cash and cash equivalents(1)
$217,514 $107,921 
Marketable securities:
U.S. Treasury securities$37,557 $73,448 
Corporate notes and bonds26,451 105,566 
Commercial paper26,725 25,934 
Agency bonds— 9,851 
Total marketable securities, current(2)
$90,733 $214,799 
Corporate notes and bonds— 5,999 
Asset-backed securities— 89 
Total marketable securities, non-current(3)
$— $6,088 
Total marketable securities$90,733 $220,887 
Total cash and cash equivalents and marketable securities$308,247 $328,808 
(1) The Company’s cash equivalents include investments with an original maturity date of three months or less.
(2) The Company classifies its marketable securities as current, where it intends to hold the securities for less than 12 months.
(3) The Company classifies its marketable securities are non-current, where it intends to hold the securities for longer than 12 months.
Schedule of Available-For-Sale Investments
The following table summarizes adjusted cost, gross unrealized gains and losses, and fair value related to cash equivalents and available-for-sale securities on the accompanying condensed consolidated balance sheets as of September 30, 2024 and December 31, 2023:
As of September 30, 2024
Amortized
Cost		Gross
Unrealized
Gain		Gross
Unrealized
Loss		Fair
Value
(in thousands)
Cash equivalents:
Money market funds$149,480 $— $— $149,480 
U.S. Treasury securities49,773 16 — 49,789 
Marketable securities:
U.S. Treasury securities37,530 27 — 37,557 
Corporate notes and bonds26,450 9 (8)26,451 
Commercial paper26,712 14 (1)26,725 
Total$289,945 $66 $(9)$290,002 
As of December 31, 2023
Amortized
Cost		Gross
Unrealized
Gain		Gross
Unrealized
Loss		Fair
Value
(in thousands)
Cash equivalents:
U.S. Treasury securities$52,824 $6 $— $52,830 
Commercial paper12,663 — (7)12,656 
Marketable securities:
U.S. Treasury securities73,444 8 (4)73,448 
Corporate notes and bonds112,487 9 (931)111,565 
Commercial paper25,946 — (12)25,934 
Asset-backed securities89 — — 89 
Agency bonds9,854 — (3)9,851 
Total $287,307 $23 $(957)$286,373 
Schedule of Financial Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis
Financial assets and liabilities measured and recorded at fair value on a recurring basis consisted of the following types of instruments:
As of September 30, 2024
Level 1Level 2Level 3Total
(in thousands)
Cash equivalents:
Money market funds$149,480 $— $— $149,480 
U.S. Treasury securities— 49,789 — 49,789 
Total cash equivalents149,480 49,789 — 199,269 
Marketable securities:
U.S. Treasury securities— 37,557 — 37,557 
Corporate notes and bonds— 26,451 — 26,451 
Commercial paper— 26,725 — 26,725 
Total marketable securities— 90,733 — 90,733 
Total financial assets$149,480 $140,522 $— $290,002 
As of December 31, 2023
Level 1Level 2Level 3Total
(in thousands)
Cash equivalents:
Money market funds$21,166 $— $— $21,166 
U.S. Treasury securities— 52,830 — 52,830 
Commercial paper— 12,656 — 12,656 
Total cash equivalents21,166 65,486 — 86,652 
Marketable securities:
U.S. Treasury securities— 73,448 — 73,448 
Corporate notes and bonds— 111,565 — 111,565 
Commercial paper— 25,934 — 25,934 
Asset-backed securities— 89 — 89 
Agency bonds— 9,851 — 9,851 
Total marketable securities— 220,887 — 220,887 
Restricted cash:
Restricted cash, current150 — — 150 
Total restricted cash150 — — 150 
Total financial assets$21,316 $286,373 $— $307,689