Basic And Diluted Net Loss Per Share - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Detail) - shares	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Preferred Stock [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [LineItems]
Antidilutive Securities Excluded From Computation Of Earnings Pe rShare Amount	251,440,808	500,211,192	431,914,761
Share Options And Restricted Share Units [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [LineItems]
Antidilutive Securities Excluded From Computation Of Earnings Pe rShare Amount	78,376,179	60,853,313	38,394,825

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.

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

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration