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Note 11 - Debt (Tables)
 6 Months Ended
Jun. 30, 2016
Notes Tables  
Schedule of Long-term Debt Instruments [Table Text Block]
   
June 30,
2016
  
December 31,
2015
Equipment-based Facility   $ 15,574     $ 17,957  
Less deferred loan costs     (979 )     (1,119 )
Equipment-based Facility, net     14,595       16,838  
Notes payable for transportation and construction equipment and other    
3,303
       3,342  
      17,898       20,180  
                 
Current maturities of long-term debt     5,190       5,192  
Less current deferred loan costs     (336 )     (336 )
Less current maturities of long-term debt, net     (4,854 )     (4,856 )
Total long-term debt   $
13,044
     $ 15,324  
Schedule of Debt [Table Text Block]
    June 30, 2016   December 31, 2015
    Carrying Value   Fair Value   Carrying Value   Fair Value
                 
Revolving Loan   $ -     $ -     $ -     $ -  
Term Loan     15,574       15,513       17,957       17,957  
Total Equipment-based Facility debt   $ 15,574     $ 15,513     $ 17,957     $ 17,957