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Note 2 - Discontinued Operations (Tables)
 9 Months Ended
Sep. 30, 2017
Notes Tables  
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Table Text Block]
   
September 30,
2017
    
December 31,
2016
  
Assets
  
 
 
 
  
 
 
 
Inventories
   $
388
     $
392
  
Property and equipment, net
    
36,051
      
36,430
  
Total assets
  $
36,439
     $
36,822
  
Discontinued Operation, Income (Loss) from Discontinued Operation Disclosures [Table Text Block]
   
Three Months Ended September 30,
   
Nine Months Ended September 30,
 
   
2017
    
2016
    
2017
    
2016
  
                                 
Net sales
  $
-
     $
13
     $
9
     $
6,869
  
Cost of sales
   
457
      
829
      
1,469
      
8,262
  
Gross loss
   
(457
 )    
(816
 )    
(1,460
 )    
(1,393
 )
Selling, general and administrative expense
   
(1
 )    
(6
 )    
(1
 )    
257
  
Operating loss
   
(456
 )    
(810
 )    
(1,459
 )    
(1,650
 )
Interest expense
   
-
      
-
      
-
      
(3
 )
Loss before income taxes
   
(456
 )    
(810
 )    
(1,459
 )    
(1,653
 )
Income tax expense (benefit)
   
26
      
(117
 )    
(4
 )    
(124
 )
Net loss
  $
(482
 )   $
(693
 )   $
(1,455
 )   $
(1,529
 )