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Note 16 - Capital Management (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 2 Months Ended 12 Months Ended 22 Months Ended
Jun. 13, 2023
Jun. 30, 2018
Dec. 31, 2024
Jul. 31, 2024
Jan. 31, 2024
Jun. 30, 2023
Jan. 31, 2023
Oct. 31, 2022
Feb. 28, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Nov. 30, 2023
Jan. 31, 2022
Disclosure of objectives, policies and processes for managing capital [line items]                            
Dividends proposed or declared before financial statements authorised for issue but not recognised as distribution to owners per share (in dollars per share)     $ 0.4           $ 0.4          
Dividends, per share       $ 0.4 $ 0.4 $ 0.4 $ 0.8     $ 0.8 $ 1.2      
Dividend payables       $ 70,400 $ 70,400 $ 36,000 $ 71,300              
Dividends recognised as distributions to owners       $ 7,800 $ 25,100   12,300     $ 70,398 $ 107,222      
Payments to acquire or redeem entity's shares                   0 32,695 $ 146,068    
Capital reserved for investments in listed equity securities     $ 70,000             70,000        
Net fair value gain (loss) related to listed equity instruments             34,200              
Treasury shares [member]                            
Disclosure of objectives, policies and processes for managing capital [line items]                            
Dividends recognised as distributions to owners                     0      
Qifei International Development Co, Ltd [member]                            
Disclosure of objectives, policies and processes for managing capital [line items]                            
Payments to acquire or redeem entity's shares               $ 128,600   0 0 128,563    
Kunlun and Keeneyes Future Holding [member]                            
Disclosure of objectives, policies and processes for managing capital [line items]                            
Dividend payables             $ 59,000              
Net fair value gain (loss) related to listed equity instruments                   0 3,243 $ 15,946    
Kunlun Tech Limited [member]                            
Disclosure of objectives, policies and processes for managing capital [line items]                            
Dividends recognised as distributions to owners $ 25,100                 33,000 25,100      
Star X [member]                            
Disclosure of objectives, policies and processes for managing capital [line items]                            
Dividend payables     $ 33,000             $ 33,000 $ 25,100      
ADS [member]                            
Disclosure of objectives, policies and processes for managing capital [line items]                            
Dividends, per share $ 0.4     $ 0.4 $ 0.4         $ 0.8 $ 1.2 $ 0    
Share repurchase program, maximum authorized amount                           $ 50,000
Number of shares repurchased during period (in shares)   36,971,296               0 2,765,346 26,729,495 6,119,841  
Payments to acquire or redeem entity's shares   $ 239,000               $ 0 $ 32,695 $ 146,068 $ 50,000  
ADS [member] | Treasury shares [member]                            
Disclosure of objectives, policies and processes for managing capital [line items]                            
Number of shares repurchased during period (in shares)                   2,768,009        
Ordinary shares [member] | Qifei International Development Co, Ltd [member]                            
Disclosure of objectives, policies and processes for managing capital [line items]                            
Number of shares repurchased during period (in shares)               23,375,000            
Payments to acquire or redeem entity's shares               $ 128,600