Fair Value Measurements - Schedule of Financial Assets Measured at Fair Value on Recurring Basis (Details) $ in Thousands	Mar. 31, 2021 USD ($)
Marketable securities:
Total cash equivalents and marketable securities	$ 345,651
Level 1
Marketable securities:
Total cash equivalents and marketable securities	81,474
Level 2
Marketable securities:
Total cash equivalents and marketable securities	264,177
Money Market Funds
Cash equivalents:
Money market funds	81,474
Money Market Funds \| Level 1
Cash equivalents:
Money market funds	81,474
Corporate Debt Securities
Cash equivalents:
Money market funds	13,115
Marketable securities:
Corporate debt securities	161,007
Corporate Debt Securities \| Level 2
Cash equivalents:
Money market funds	13,115
Marketable securities:
Corporate debt securities	161,007
US Treasury Securities
Marketable securities:
Corporate debt securities	84,996
US Treasury Securities \| Level 2
Marketable securities:
Corporate debt securities	84,996
U.S. Government Debt Securities
Marketable securities:
Corporate debt securities	5,059
U.S. Government Debt Securities \| Level 2
Marketable securities:
Corporate debt securities	$ 5,059

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