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Note 4 - Credit Facilities and Other Debt (Tables)
 3 Months Ended
Mar. 31, 2018
Notes Tables  
Schedule of Debt [Table Text Block]
   
Interest Rate
as of
March 31, 2018
    
2018
    
2019
    
2020
    
2021
    
2022
    
2023
  
USA - PNC Bank
  
4.383%
    
$
–
     $
–
     $
6,137
    
$
–
    
$
–
    
$
–
  
USA – Fifth Third Bank
  
4.383%
    
 
–
      
–
      
780
    
 
–
    
 
–
    
 
–
  
USA – Resource Plus Seller Notes
  
1.85%
    
 
333
      
333
      
334
      
300
      
300
      
1,100
  
Australia - National Australia Bank
  
6.3%
    
 
443
      
–
    
 
–
    
 
–
    
 
–
    
 
–
  
Brazil – Daycoval Bank
  
1.28%
    
 
1,597
      
–
    
 
–
    
 
–
    
 
–
    
 
–
  
Total
  
 
 
  
$
2,373
     $
333
     $
7,251
     $
300
     $
300
     $
1,100
  
Credit And Debt Facilities Unused Availability [Table Text Block]
   
March 31, 2018
    
December 31, 2017
  
Unused Availability:
                
United States
   $
5,583
     $
3,530
  
Australia
    
172
      
731
  
Mexico
    
275
      
254
  
Brazil
    
1,129
      
1,554
  
Total Unused Availability
   $
7,159
     $
6,069