Fair Value Measurements - Recurring Fair Value Measurements (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Assets
Short-term investments	$ 268,724	$ 440,858
Fair Value, Measurements, Recurring
Assets
Total assets	1,127,309	903,317
Fair Value, Measurements, Recurring \| Money market funds
Assets
Money market funds	627,983	462,459
Fair Value, Measurements, Recurring \| U.S. treasury bills
Assets
Money market funds	230,602
Fair Value, Measurements, Recurring \| U.S. treasury securities
Assets
Short-term investments	240,256	378,002
Fair Value, Measurements, Recurring \| U.S. agency securities
Assets
Short-term investments	14,993	29,059
Fair Value, Measurements, Recurring \| Commercial paper
Assets
Short-term investments		28,815
Fair Value, Measurements, Recurring \| Asset-backed securities
Assets
Short-term investments	10,500
Fair Value, Measurements, Recurring \| Corporate debt securities
Assets
Short-term investments	2,975	4,982
Fair Value, Measurements, Recurring \| Level 1
Assets
Total assets	1,098,841	840,461
Fair Value, Measurements, Recurring \| Level 1 \| Money market funds
Assets
Money market funds	627,983	462,459
Fair Value, Measurements, Recurring \| Level 1 \| U.S. treasury bills
Assets
Money market funds	230,602
Fair Value, Measurements, Recurring \| Level 1 \| U.S. treasury securities
Assets
Short-term investments	240,256	378,002
Fair Value, Measurements, Recurring \| Level 1 \| U.S. agency securities
Assets
Short-term investments	0	0
Fair Value, Measurements, Recurring \| Level 1 \| Commercial paper
Assets
Short-term investments		0
Fair Value, Measurements, Recurring \| Level 1 \| Asset-backed securities
Assets
Short-term investments	0
Fair Value, Measurements, Recurring \| Level 1 \| Corporate debt securities
Assets
Short-term investments	0	0
Fair Value, Measurements, Recurring \| Level 2
Assets
Total assets	28,468	62,856
Fair Value, Measurements, Recurring \| Level 2 \| Money market funds
Assets
Money market funds	0	0
Fair Value, Measurements, Recurring \| Level 2 \| U.S. treasury bills
Assets
Money market funds	0
Fair Value, Measurements, Recurring \| Level 2 \| U.S. treasury securities
Assets
Short-term investments	0	0
Fair Value, Measurements, Recurring \| Level 2 \| U.S. agency securities
Assets
Short-term investments	14,993	29,059
Fair Value, Measurements, Recurring \| Level 2 \| Commercial paper
Assets
Short-term investments		28,815
Fair Value, Measurements, Recurring \| Level 2 \| Asset-backed securities
Assets
Short-term investments	10,500
Fair Value, Measurements, Recurring \| Level 2 \| Corporate debt securities
Assets
Short-term investments	2,975	4,982
Fair Value, Measurements, Recurring \| Level 3
Assets
Total assets	0	0
Fair Value, Measurements, Recurring \| Level 3 \| Money market funds
Assets
Money market funds	0	0
Fair Value, Measurements, Recurring \| Level 3 \| U.S. treasury bills
Assets
Money market funds	0
Fair Value, Measurements, Recurring \| Level 3 \| U.S. treasury securities
Assets
Short-term investments	0	0
Fair Value, Measurements, Recurring \| Level 3 \| U.S. agency securities
Assets
Short-term investments	0	0
Fair Value, Measurements, Recurring \| Level 3 \| Commercial paper
Assets
Short-term investments		0
Fair Value, Measurements, Recurring \| Level 3 \| Asset-backed securities
Assets
Short-term investments	0
Fair Value, Measurements, Recurring \| Level 3 \| Corporate debt securities
Assets
Short-term investments	$ 0	$ 0

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 820
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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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-Publisher FASB
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
-Section S99
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
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- Definition

Amount of 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. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(2))
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