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Earnings (Loss) Per Share - Summary of Computation Earnings (Loss) Per Common Share Using Two Class Method (Parenthetical) (Detail) - $ / shares
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Series A Preferred Shares [Member]          
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]          
Percentage of increase in weighted average market price per share     20.00%    
Number of shares multiplied for annual dividend 141,194,638   141,194,638    
Annual dividend calculated based on price appreciate over the initial offering price         $ 10.00
Annual dividend calculated based on price appreciate over the highest price previously used     $ 17.8829    
Warrants To Purchase Ordinary Shares [Member]          
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]          
Conversion Ratio       3:1 basis  
Conversion of Stock, New Issuance       21,265,359  
Number of share issuable upon exercise of warrants       21,265,359  
Employee Stock Option [Member]          
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]          
Antidilutive Securities Excluded from Calculation of Diluted Earnings Per Share       162,500  
Warrant [Member]          
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]          
Antidilutive Securities Excluded from Calculation of Diluted Earnings Per Share       63,796,076  
Series A Convertible Preferred Stock [Member]          
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]          
Antidilutive Securities Excluded from Calculation of Diluted Earnings Per Share 4,000,000 4,000,000 4,000,000 4,000,000