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Related Party Transactions - Summary of Significant Related Party Transactions (Detail)
shares in Thousands, $ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2024
TWD ($)
shares
Dec. 31, 2023
TWD ($)
Dec. 31, 2024
USD ($)
Disclosure of transactions between related parties [Line Items]      
Payable to equipment suppliers $ 21,473 $ 58,549 $ 655
Unimos Shanghai [member]      
Disclosure of transactions between related parties [Line Items]      
Relationship Associate    
JMC ELECTRONICS CO., LTD. [member]      
Disclosure of transactions between related parties [Line Items]      
Relationship Associate    
Daypower Energy [member]      
Disclosure of transactions between related parties [Line Items]      
Relationship Associate    
Payable to equipment suppliers $ 21,473 58,549  
Number of shares traded | shares 1,000    
Acquisition price $ 12,500    
Siliconware Precision Industries Co., Ltd. [member]      
Disclosure of transactions between related parties [Line Items]      
Relationship Entity that has significant influence over the Company    
Acquisition of property, plant and equipment $ 10,496 $ 35,261