Fair Value Measurements - Summary of Financial Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Assets
Short-term marketable securities	$ 33,922	$ 49,620
Level 1 \| Recurring
Assets
Total assets measured at fair value	5,602	4,207
Level 2 \| Recurring
Assets
Total assets measured at fair value	48,244	49,620
Level 3 \| Recurring
Assets
Total assets measured at fair value	0	0
Carrying Value \| Recurring
Assets
Total assets measured at fair value	53,846	53,827
Fair Value \| Recurring
Assets
Total assets measured at fair value	53,846	53,827
Agency bonds
Assets
Short-term marketable securities	26,826
Agency bonds \| Level 1 \| Recurring
Assets
Short-term marketable securities	0	0
Agency bonds \| Level 2 \| Recurring
Assets
Short-term marketable securities	26,826	35,423
Agency bonds \| Level 3 \| Recurring
Assets
Short-term marketable securities	0	0
Agency bonds \| Carrying Value \| Recurring
Assets
Short-term marketable securities	26,826	35,423
Agency bonds \| Fair Value \| Recurring
Assets
Short-term marketable securities	26,826	35,423
Commercial paper
Assets
Short-term marketable securities	7,096
Commercial paper \| Level 1 \| Recurring
Assets
Short-term marketable securities	0	0
Commercial paper \| Level 2 \| Recurring
Assets
Short-term marketable securities	7,096	14,197
Commercial paper \| Level 3 \| Recurring
Assets
Short-term marketable securities	0	0
Commercial paper \| Carrying Value \| Recurring
Assets
Short-term marketable securities	7,096	14,197
Commercial paper \| Fair Value \| Recurring
Assets
Short-term marketable securities	7,096	14,197
Money market funds
Assets
Cash equivalents	5,602
Money market funds \| Level 1 \| Recurring
Assets
Cash equivalents	5,602	4,207
Money market funds \| Level 2 \| Recurring
Assets
Cash equivalents	0	0
Money market funds \| Level 3 \| Recurring
Assets
Cash equivalents	0	0
Money market funds \| Carrying Value \| Recurring
Assets
Cash equivalents	5,602	4,207
Money market funds \| Fair Value \| Recurring
Assets
Cash equivalents	5,602	$ 4,207
Commercial paper
Assets
Cash equivalents	14,322
Commercial paper \| Level 1 \| Recurring
Assets
Cash equivalents	0
Commercial paper \| Level 2 \| Recurring
Assets
Cash equivalents	14,322
Commercial paper \| Level 3 \| Recurring
Assets
Cash equivalents	0
Commercial paper \| Carrying Value \| Recurring
Assets
Cash equivalents	14,322
Commercial paper \| Fair Value \| Recurring
Assets
Cash equivalents	$ 14,322

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

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
-Paragraph 1
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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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