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Net Loss per Share - Summary of diluted net loss per share (Detail) - shares
12 Months Ended
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