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Fair Value Measurement - Summary of Liabilities Carried at Fair Value Measured on Recurring Basis (Detail) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Dec. 31, 2020
Liabilities:      
Total recorded at fair value $ (1,742) $ (1,501) $ (1,785)
Fair Value, Measurements, Recurring | Fair Value Measurement [Domain] | business acquisition      
Liabilities:      
Total recorded at fair value   1,350  
Fair Value, Measurements, Recurring | Carrying Value      
Liabilities:      
Put option of noncontrolling shareholders (142) (151)  
Total recorded at fair value (1,742) (1,501)  
Fair Value, Measurements, Recurring | Carrying Value | business acquisition      
Liabilities:      
Total recorded at fair value 1,600    
Fair Value, Measurements, Recurring | Level 1 | Fair Value      
Liabilities:      
Put option of noncontrolling shareholders 0 0  
Total recorded at fair value 0 0  
Fair Value, Measurements, Recurring | Level 2 | Fair Value      
Liabilities:      
Put option of noncontrolling shareholders 0 0  
Total recorded at fair value 0 0  
Fair Value, Measurements, Recurring | Level 3 | Fair Value      
Liabilities:      
Put option of noncontrolling shareholders (142) (151)  
Total recorded at fair value $ (1,742) $ (1,501)