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Taxation - Additional Information (Detail)
¥ in Thousands, $ in Thousands
12 Months Ended
Apr. 01, 2018
Dec. 31, 2021
CNY (¥)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
CNY (¥)
Dec. 31, 2019
CNY (¥)
Operating Loss Carryforwards [Line Items]          
Statutory income tax rate of the PRC   25.00% 25.00% 25.00% 25.00%
Withholding income tax percentage         10.00%
Percentage of share holding in FIE         25.00%
Withholding tax amount   ¥ 0   ¥ 0  
Income Tax Expense (Benefit)   ¥ 376 $ 59 999 ¥ 0
HONG KONG [Member] | Inland Revenue, Hong Kong [Member]          
Operating Loss Carryforwards [Line Items]          
Statutory income tax rate of the PRC 16.50%        
HONG KONG [Member] | Inland Revenue, Hong Kong [Member] | Minimum [Member]          
Operating Loss Carryforwards [Line Items]          
Withholding income tax percentage         5.00%
CHINA [Member] | State Administration of Taxation, China [Member]          
Operating Loss Carryforwards [Line Items]          
Statutory income tax rate of the PRC         25.00%
Preferential tax rate         15.00%
SINGAPORE          
Operating Loss Carryforwards [Line Items]          
Statutory income tax rate of the PRC   17.00% 17.00%    
Withholding income tax percentage   0.00% 0.00%    
Income Tax Expense (Benefit)   ¥ 300   ¥ 1,000  
Assessable profits on the first HK$2 million [Member] | HONG KONG [Member] | Inland Revenue, Hong Kong [Member]          
Operating Loss Carryforwards [Line Items]          
Statutory income tax rate of the PRC 8.25%        
Assessable profits in excess of HK$2 million [Member] | HONG KONG [Member] | Inland Revenue, Hong Kong [Member]          
Operating Loss Carryforwards [Line Items]          
Statutory income tax rate of the PRC 16.50%