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Note 8 - Long-term Investments (Tables)
3 Months Ended
Mar. 31, 2023
Notes Tables  
Other Investments Not Readily Marketable [Table Text Block]
  

Amount

 
  

US$(000)

 
     

Balance as of January 1, 2023

  1,596 

Exchange translation adjustment

  8 

Balance as of March 31, 2023 (Unaudited)

  1,604