v3.25.4
Details of Significant Accounts - Share capital, narrative (Details)
$ / shares in Units, $ in Thousands
 12 Months Ended
Nov. 29, 2023
shares
Dec. 31, 2025
USD ($)
Vote
$ / shares
shares
Dec. 31, 2024
USD ($)
$ / shares
shares
Dec. 31, 2023
USD ($)
$ / shares
shares
Share capital        
Authorized capital | $   $ 82,000 $ 82 $ 82
Shares reserved for employee stock options (in shares)   30,000,000 30,000,000 30,000,000
Capital stock | $   $ 10,185 $ 10,185 $ 10,192
Shares retired (in shares)   16,388,000    
Number of shares surrendered by shareholder (in shares)   27,000    
Ordinary shares (in USD per share) | $ / shares     $ 0.1 $ 0.1
Number of class B ordinary share convertible into class A ordinary share (in shares)   1    
Perfect Class A Ordinary Shares        
Share capital        
Number of shares authorized (in shares)   700,000,000 700,000,000 700,000,000
Capital stock | $   $ 8,506 $ 8,506  
Number of shares of ordinary stock (in shares)   85,060,000 85,060,000 85,128,000
Shares retired (in shares)     68,000 16,347,000
Number of shares surrendered by shareholder (in shares) 27,000      
Ordinary shares (in USD per share) | $ / shares   $ 0.1 $ 0.1  
Number of votes per share | Vote   1    
Perfect Class B Ordinary Shares        
Share capital        
Number of shares authorized (in shares)   90,000,000 90,000,000 90,000,000
Capital stock | $   $ 1,679 $ 1,679  
Number of shares of ordinary stock (in shares)   16,789,000 16,789,000 16,789,000
Shares retired (in shares)     0 0
Ordinary shares (in USD per share) | $ / shares   $ 0.1 $ 0.1  
Number of votes per share | Vote   10