v3.25.1
Organization and Business Background - Additional Information (Details)
$ / shares in Units, ¥ in Thousands, $ in Thousands
1 Months Ended
Jun. 29, 2020
HKD ($)
Nov. 20, 2019
HKD ($)
Apr. 20, 2018
HKD ($)
Nov. 14, 2015
CNY (¥)
Nov. 14, 2015
USD ($)
Sep. 25, 2013
USD ($)
Nov. 30, 2011
USD ($)
$ / shares
shares
Dec. 31, 2024
USD ($)
$ / shares
shares
Nov. 29, 2024
HKD ($)
Dec. 31, 2023
$ / shares
shares
Nov. 15, 2019
HKD ($)
Apr. 30, 2011
shares
Sep. 13, 2010
shares
Aug. 06, 2010
$ / shares
shares
Organization And Business Background                            
Ordinary share, par value (in dollars per share) | $ / shares               $ 0.001   $ 0.001        
Ordinary share, shares issued | shares               12,938,128   12,938,128        
Allied Sun Corporation Limited                            
Organization And Business Background                            
Negative net worth $ 1,600                          
Proceeds received from disposal of subsidiary $ 27,000                          
Plastec International Holdings Limited                            
Organization And Business Background                            
Consideration for disposal     $ 70,000                      
Amounts due from former subsidiary disposed of     $ 258,910,000                      
Unaffiliated third party                            
Organization And Business Background                            
Consideration for disposal                     $ 47,965,000      
Amounts due from former subsidiary disposed of   $ 112,035,000                        
Sun Line Industrial Limited                            
Organization And Business Background                            
Consideration for disposal                 $ 4,650,000          
Discontinued operation, Assets (Liabilities), Net                 4,650,000          
Sun Line Industrial Limited | Disposal Group, Disposed of by Sale, Not Discontinued Operations                            
Organization And Business Background                            
Consideration for disposal                 4,650,000          
Discontinued operation, Assets (Liabilities), Net                 $ 4,650,000          
Hong Kong subsidiary                            
Organization And Business Background                            
Aggregate purchase price       ¥ 1,250,000,000 $ 195,312,500                  
Repurchase Program 2013                            
Organization And Business Background                            
Stock repurchase program, remaining authorized repurchase amount               $ 1,431,918            
Merger Agreement                            
Organization And Business Background                            
Common stock shares receivable pursuant to merger | shares                           16,948,053
Ordinary share, par value (in dollars per share) | $ / shares                           $ 0.001
Amended and Restated Merger Agreement                            
Organization And Business Background                            
Total number of common stock shares received pursuant to merger | shares                         16,778,571  
Common stock shares received on closing of merger | shares                         7,054,583  
Remaining common stock issued | shares                         9,723,988  
Remaining common stock issued year one | shares                         (2,944,767)  
Remaining common stock issued year two | shares                         3,389,610  
Remaining common stock issued year three | shares                         3,389,611  
Ordinary share, shares issued | shares                       7,486,845    
Conversion of stock, shares converted | shares             2,615,732              
Average conversion of stock shares converted price per share | $ / shares             $ 10.3              
Amended and Restated Merger Agreement | Repurchase Program 2011                            
Organization And Business Background                            
Share redeemed and cancelled             $ 5,000              
Amended and Restated Merger Agreement | Repurchase Program 2013                            
Organization And Business Background                            
Share redeemed and cancelled           $ 5,000