v3.24.1
Share-based Payment Arrangements - Summary of Fair Value using Trinomial Tree Model and Inputs (Detail)
 12 Months Ended
Dec. 31, 2023
yr
$ / shares
Dec. 31, 2023
yr
¥ / shares
Dec. 31, 2020
yr
Usish Employee Stock Ownership Plan Restricted Shares Two Thousand And Twenty Three [Member]      
Disclosure of terms and conditions of share-based payment arrangement [Line Items]      
Share price at the grant date | ¥ / shares   ¥ 15.02  
Exercise price | ¥ / shares   14.54  
USISH Two Thousand And Twenty Three Share Options Plan [Member]      
Disclosure of terms and conditions of share-based payment arrangement [Line Items]      
Share price at the grant date | ¥ / shares   15.16  
Exercise price | ¥ / shares   14.54  
Trinomial Tree Model [member] | AMPI Two Thousand And Twenty Two Share Options Plan [Member]      
Disclosure of terms and conditions of share-based payment arrangement [Line Items]      
Share price at the grant date | $ / shares $ 7.5    
Exercise price | $ / shares 7.5    
Trinomial Tree Model [member] | AMPI Stock Ownership Plan Restricted Shares Amended In Two Thousand And Twenty Three [Member]      
Disclosure of terms and conditions of share-based payment arrangement [Line Items]      
Share price at the grant date | $ / shares 30.2    
Exercise price | $ / shares 30    
Trinomial Tree Model [member] | The Company Two Thousand And Twenty Three Share Options Plan [Member]      
Disclosure of terms and conditions of share-based payment arrangement [Line Items]      
Share price at the grant date | $ / shares 108    
Exercise price | $ / shares $ 107    
Binomial Method [Member] | USISH employee stock ownership restricted stock ownership plan amendment 2021 [Member]      
Disclosure of terms and conditions of share-based payment arrangement [Line Items]      
Share price at the grant date | ¥ / shares   ¥ 14.65  
Expected volatility     47.15%
Lock-up periods     1.3
Risk free interest rate     2.34%
Bottom of range [member] | Usish Employee Stock Ownership Plan Restricted Shares Two Thousand And Twenty Three [Member]      
Disclosure of terms and conditions of share-based payment arrangement [Line Items]      
Expected volatility 36.56% 36.56%  
Lock-up periods 1 1  
Risk free interest rate 2.33% 2.33%  
Bottom of range [member] | USISH Two Thousand And Twenty Three Share Options Plan [Member]      
Disclosure of terms and conditions of share-based payment arrangement [Line Items]      
Expected volatility 38.51% 38.51%  
Expected lives 2 2  
Risk free interest rate 2.35% 2.35%  
Bottom of range [member] | Trinomial Tree Model [member] | AMPI Two Thousand And Twenty Two Share Options Plan [Member]      
Disclosure of terms and conditions of share-based payment arrangement [Line Items]      
Expected volatility 65.35% 65.35%  
Expected lives 6 6  
Risk free interest rate 1.15% 1.15%  
Bottom of range [member] | Trinomial Tree Model [member] | AMPI Stock Ownership Plan Restricted Shares Amended In Two Thousand And Twenty Three [Member]      
Disclosure of terms and conditions of share-based payment arrangement [Line Items]      
Expected volatility 65.85% 65.85%  
Expected lives 5.8 5.8  
Risk free interest rate 1.11% 1.11%  
Bottom of range [member] | Trinomial Tree Model [member] | The Company Two Thousand And Twenty Three Share Options Plan [Member]      
Disclosure of terms and conditions of share-based payment arrangement [Line Items]      
Expected volatility 31.02% 31.02%  
Expected lives 3.9 3.9  
Risk free interest rate 1.06% 1.06%  
Top of range [member] | Usish Employee Stock Ownership Plan Restricted Shares Two Thousand And Twenty Three [Member]      
Disclosure of terms and conditions of share-based payment arrangement [Line Items]      
Expected volatility 38.77% 38.77%  
Lock-up periods 2 2  
Risk free interest rate 2.44% 2.44%  
Top of range [member] | USISH Two Thousand And Twenty Three Share Options Plan [Member]      
Disclosure of terms and conditions of share-based payment arrangement [Line Items]      
Expected volatility 39.09% 39.09%  
Expected lives 3 3  
Risk free interest rate 2.45% 2.45%  
Top of range [member] | Trinomial Tree Model [member] | AMPI Two Thousand And Twenty Two Share Options Plan [Member]      
Disclosure of terms and conditions of share-based payment arrangement [Line Items]      
Expected volatility 67.78% 67.78%  
Expected lives 7 7  
Risk free interest rate 1.19% 1.19%  
Top of range [member] | Trinomial Tree Model [member] | AMPI Stock Ownership Plan Restricted Shares Amended In Two Thousand And Twenty Three [Member]      
Disclosure of terms and conditions of share-based payment arrangement [Line Items]      
Expected volatility 67.29% 67.29%  
Expected lives 6.8 6.8  
Risk free interest rate 1.15% 1.15%  
Top of range [member] | Trinomial Tree Model [member] | The Company Two Thousand And Twenty Three Share Options Plan [Member]      
Disclosure of terms and conditions of share-based payment arrangement [Line Items]      
Expected volatility 33.03% 33.03%  
Expected lives 6.1 6.1  
Risk free interest rate 1.12% 1.12%