Fair Value Measurements (Details) - Recurring basis - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Assets
Total assets	$ 176,356	$ 240,551
U.S. Treasury securities
Assets
Investments	28,566
U.S. Government Agency securities
Assets
Investments	7,353
Cash.
Assets
Cash and cash equivalents, fair value	1,161	10,569
Money market funds
Assets
Cash and cash equivalents, fair value	139,276	229,982
Level 1
Assets
Total assets	140,437	240,551
Level 1 \| Cash.
Assets
Cash and cash equivalents, fair value	1,161	10,569
Level 1 \| Money market funds
Assets
Cash and cash equivalents, fair value	139,276	$ 229,982
Level 2
Assets
Total assets	35,919
Level 2 \| U.S. Treasury securities
Assets
Investments	28,566
Level 2 \| U.S. Government Agency securities
Assets
Investments	$ 7,353

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
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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
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