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Note 4 - Credit Facilities (Tables)
 12 Months Ended
Dec. 31, 2020
Notes Tables  
Schedule of Debt [Table Text Block]
   
Interest Rate as of
      
 
 
    
 
 
    
 
 
    
 
 
    
 
 
   
December 31, 2020
    
2021
    
2022
    
2023
    
2024
    
2025
  
USA - North Mill Capital
    
6.75
 %    
8,262
      
–
      
–
      
–
      
–
  
USA - Fifth Third Bank
    
3.60
 %    
–
      
–
      
–
      
–
      
–
  
USA - Resource Plus Sellers    
1.85
 %    
300
      
300
      
700
      
–
      
–
  
Australia - National Australia Bank    
6.56
 %    
154
      
–
      
–
      
–
      
–
  
China - Industrial Bank    
4.65
 %    
460
      
–
      
–
      
–
      
–
  
China - CCB Bank    
4.25
 %    
153
      
–
      
–
      
–
      
–
  
Mexico - Ve Por Mas    
8.00
 %    
–
      
–
      
–
      
–
      
–
  
Total
    
 
     $
9,329
     $
300
     $
700
     $
-
     $
-
  
Credit And Debt Facilities Unused Availability [Table Text Block]
   
December 31, 2020
    
December 31, 2019
  
Unused Availability:
                
United States
   $
10,238
     $
3,694
  
Mexico
    
262
      
–
  
Australia    
463
      
423
  
Brazil    
–
      
49
  
Total Unused Availability
   $
10,963
     $
4,166