Fair Value Measurements - Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Financial Assets
Marketable securities	$ 478,461	$ 619,916
Money market funds
Financial Assets
Marketable securities	210,705	203,519
U.S. Treasuries
Financial Assets
Marketable securities	68,152	123,933
Commercial paper
Financial Assets
Marketable securities	42,034	89,687
Corporate notes/bonds
Financial Assets
Marketable securities	34,024	76,078
Recurring
Financial Assets
Total financial assets	482,338	623,793
Recurring \| Money market funds
Financial Assets
Cash and cash equivalents	210,705	203,519
Restricted cash	$ 3,877	$ 3,877
Restricted Cash and Cash Equivalents, Statement of Financial Position [Extensible Enumeration]	Other Assets, Noncurrent	Other Assets, Noncurrent
Recurring \| U.S. Treasuries
Financial Assets
Marketable securities	$ 68,152	$ 123,933
Recurring \| Government agency securities
Financial Assets
Marketable securities	123,546	126,699
Recurring \| Commercial paper
Financial Assets
Marketable securities	42,034	89,687
Recurring \| Corporate notes/bonds
Financial Assets
Marketable securities	34,024	76,078
Recurring \| Level 1
Financial Assets
Total financial assets	282,734	331,329
Recurring \| Level 1 \| Money market funds
Financial Assets
Cash and cash equivalents	210,705	203,519
Restricted cash	$ 3,877	$ 3,877
Restricted Cash and Cash Equivalents, Statement of Financial Position [Extensible Enumeration]	Other Assets, Noncurrent	Other Assets, Noncurrent
Recurring \| Level 1 \| U.S. Treasuries
Financial Assets
Marketable securities	$ 68,152	$ 123,933
Recurring \| Level 2
Financial Assets
Total financial assets	199,604	292,464
Recurring \| Level 2 \| Government agency securities
Financial Assets
Marketable securities	123,546	126,699
Recurring \| Level 2 \| Commercial paper
Financial Assets
Marketable securities	42,034	89,687
Recurring \| Level 2 \| Corporate notes/bonds
Financial Assets
Marketable securities	$ 34,024	$ 76,078

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of cash and cash equivalents restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Indicates line item in statement of financial position that includes cash and cash equivalents restricted to withdrawal or usage.

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