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Note 8 - Related Party Transactions (Tables)
3 Months Ended
Mar. 31, 2024
Notes Tables  
Schedule of Related Party Transactions [Table Text Block]
  

March 31,

  

December 31,

 
  

2024

  

2023

 

Loans from local investors:(1)

        

Mexico

  623   623 

China

  2,279   2,316 

Resource Plus

  266   266 

Total due to affiliates

 $3,168  $3,205