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Investments Accounted for Using the Equity Method - Additional Information (Detail)
shares in Thousands, $ in Thousands, $ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended
Jun. 30, 2023
TWD ($)
shares
Sep. 30, 2024
Dec. 31, 2024
TWD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
TWD ($)
Dec. 31, 2022
TWD ($)
Disclosure of Investments Accounted for Using Equity Method [line Items]            
Impairment loss on investments accounted for using the equity method     $ 42,143 $ 1,285 $ 0 $ 61,206
CHIPLETZ [Member]            
Disclosure of Investments Accounted for Using Equity Method [line Items]            
Proportion of ownership interest in associate     18.74% 18.74% 19.43%  
Percentage of Ownership (%)   18.74%        
MACHVISION Inc [Member]            
Disclosure of Investments Accounted for Using Equity Method [line Items]            
Proportion of ownership interest in associate     23.08% 23.08% 23.08%  
QUESTYLE [Member]            
Disclosure of Investments Accounted for Using Equity Method [line Items]            
Proportion of ownership interest in associate     6.67% 6.67% 6.67%  
Impairment loss on investments accounted for using the equity method     $ 42,143 $ 1,285    
Discount rate used in current estimate of value in use     11.65% 11.65%    
Private Placements [member] | MACHVISION Inc [Member]            
Disclosure of Investments Accounted for Using Equity Method [line Items]            
Consideration paid in cash for shares | $ $ 2,167,007          
Proportion of ownership interest in associate 23.08%          
Shares subscribed | shares 13,418          
Lock in period 3 years