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Note 7 - Line of Credit and Long-term Debt (Tables)
 3 Months Ended
Mar. 31, 2017
Notes Tables  
Schedule of Long-term Debt Instruments [Table Text Block]
    March 31,
2017		   December 31,
2016
Equipment-based Facility   $
2,511
     $
3,532
  
Less deferred loan costs    
(602
 )    
(803
 )
     Equipment-based Facility, net    
1,909
      
2,729
  
Notes payable for transportation and construction equipment and other    
2,388
      
2,665
  
     
4,297
      
5,394
  
                 
Current maturities of long-term debt    
3,541
      
4,648
  
Less current deferred loan costs    
(602
 )    
(803
 )
     Less current maturities of long-term debt, net    
(2,939
 )    
(3,845
 )
Total long-term debt   $
1,358
     $
1,549