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Note 9 - Long-term Investments (Tables)
9 Months Ended
Sep. 30, 2022
Notes Tables  
Other Investments Not Readily Marketable [Table Text Block]
  

Amount

 
  

US$(000)

 
     

Balance as of January 1, 2022

  2,280 

Exchange translation adjustment

  (131)

Cash investments during the year

  - 

Disposed during the year

  - 

Balance as of September 30, 2022 (Unaudited)

  2,149