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Net Loss per Share - Summary of diluted net loss per share (Detail) - shares | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 15,179,612 | 5,233,912 | 569,036,090
Preferred Shares |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount |  | 0 | 569,036,090
Share options |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 7,036,117 | 2,092,300 | 0
Restricted shares |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 5,680,877 | 3,141,612 | 0
Restricted share units |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 2,462,618 | 0 | 0

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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=124432515&loc=d3e3550-109257 + Details
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