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Summary of Significant Accounting Policies - Additional Information (Detail) - CNY (¥)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Accounting policies [line items]    
Financial asset measured at FVOCI ¥ 0 ¥ 0
Financial liabilities measured at FVPL ¥ 0 ¥ 0
Significant influence [member]    
Accounting policies [line items]    
Proportion of ownership interest in associate 20.00%  
Bottom of range [member]    
Accounting policies [line items]    
Proportion of ownership interest in associate 20.00%  
Lessee lease term 1 year  
Top of range [member]    
Accounting policies [line items]    
Proportion of ownership interest in associate 50.00%  
Lessee lease term 6 years