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Net Loss Per Share Attributable to Common Stockholders - Summary of Antidilutive Securities Excluded from Computation of Earnings Per Share Amount (Detail) - shares | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Potentially dilutive shares | 6,404,001 | 8,756,005
Redeemable Convertible Preferred Stock [Member] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Potentially dilutive shares |  | 8,191,580
Common stock options [Member] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Potentially dilutive shares | 6,308,582 | 550,176
Unvested Common Stock [Member] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Potentially dilutive shares | 76,293 | 5,095
Common stock warrants [Member] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Potentially dilutive shares |  | 9,154
ESPP withholdings [Member] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Potentially dilutive shares | 19,126 |

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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