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Fair Value Measurement (Details) - Recurring $ in Thousands	Sep. 30, 2021 USD ($)
Assets
Cash	$ 10,874
Total	305,954
Level 1
Assets
Cash	10,874
Total	42,598
Level 2
Assets
Total	263,356
Money market funds
Assets
Cash	14,723
Money market funds | Level 1
Assets
Cash	14,723
Commercial paper
Assets
Marketable securities	198,626
Commercial paper | Level 2
Assets
Marketable securities	198,626
Corporate bonds
Assets
Marketable securities	3,019
Corporate bonds | Level 2
Assets
Marketable securities	3,019
U.S. Government treasury bills
Assets
Marketable securities	17,001
U.S. Government treasury bills | Level 1
Assets
Marketable securities	17,001
Government-sponsored enterprise securities
Assets
Marketable securities	61,711
Government-sponsored enterprise securities | Level 2
Assets
Marketable securities	$ 61,711

X

- 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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
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- Definition

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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- Definition

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

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
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