Fair Value Measurements - Fair Value Recurring Basis (Details) - Recurring basis - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Assets
Total assets	$ 150,288	$ 240,551
U.S. Treasury securities
Assets
Investments	26,835
U.S. Government Agency securities
Assets
Investments	2,881
Cash.
Assets
Cash and cash equivalents, fair value	1,255	10,569
Money market funds
Assets
Cash and cash equivalents, fair value	119,317	229,982
Level 1
Assets
Total assets	120,572	240,551
Level 1 \| Cash.
Assets
Cash and cash equivalents, fair value	1,255	10,569
Level 1 \| Money market funds
Assets
Cash and cash equivalents, fair value	119,317	$ 229,982
Level 2
Assets
Total assets	29,716
Level 2 \| U.S. Treasury securities
Assets
Investments	26,835
Level 2 \| U.S. Government Agency securities
Assets
Investments	$ 2,881

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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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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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
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