Fair Value Measurements - Summary of Financial Assets and Liabilities Subject to Fair Value Measurements on Recurring Basis and Level of Inputs Used in Measurements (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Assets:
Short-term marketable securities	$ 73,617	$ 79,892
Long-term marketable securities	9,790	17,871
Fair Value, Recurring
Assets:
Cash equivalents	23,040	13,686
Short-term marketable securities	73,617	79,892
Long-term marketable securities	9,790	17,871
Total assets subject to fair value measurements on a recurring basis	106,447	111,449
Fair Value, Recurring \| Level 1
Assets:
Cash equivalents	23,040	13,686
Total assets subject to fair value measurements on a recurring basis	23,040	13,686
Fair Value, Recurring \| Level 2
Assets:
Short-term marketable securities	73,617	79,892
Long-term marketable securities	9,790	17,871
Total assets subject to fair value measurements on a recurring basis	83,407	97,763
Money market funds \| Fair Value, Recurring
Assets:
Cash equivalents	23,040	13,686
Money market funds \| Fair Value, Recurring \| Level 1
Assets:
Cash equivalents	23,040	13,686
U.S. government debt securities \| Fair Value, Recurring
Assets:
Short-term marketable securities	17,561	11,543
Long-term marketable securities	1,001	10,501
U.S. government debt securities \| Fair Value, Recurring \| Level 2
Assets:
Short-term marketable securities	17,561	11,543
Long-term marketable securities	1,001	10,501
U.S. Treasuries \| Fair Value, Recurring
Assets:
Short-term marketable securities	56,056	55,349
Long-term marketable securities	8,789	7,370
U.S. Treasuries \| Fair Value, Recurring \| Level 2
Assets:
Short-term marketable securities	56,056	55,349
Long-term marketable securities	$ 8,789	7,370
U.S. and foreign commercial paper \| Fair Value, Recurring
Assets:
Short-term marketable securities		11,999
U.S. and foreign commercial paper \| Fair Value, Recurring \| Level 2
Assets:
Short-term marketable securities		11,999
U.S. and foreign corporate debt securities \| Fair Value, Recurring
Assets:
Short-term marketable securities		1,001
U.S. and foreign corporate debt securities \| Fair Value, Recurring \| Level 2
Assets:
Short-term marketable securities		$ 1,001

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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Amount of investment in marketable security, classified as current.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=121566466&loc=d3e6676-107765

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 210
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-Section S99
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Amount of investment in marketable security, classified as noncurrent.

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