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Note 11 - Variable Interest Entities (Tables)
3 Months Ended
Mar. 31, 2014
Variable Interest Entities [Abstract]  
Schedule of Variable Interest Entities [Table Text Block]
   
March 31,
2014
   
December 31,
2013
 
Assets:
           
Current assets:
           
Cash and cash equivalents
  $ 495     $ 566  
Contracts receivable, including retainage
    9,486       6,475  
Other current assets
    4,568       7,964  
Total current assets
    14,549       15,005  
Property and equipment, net
    6,442       6,869  
Other assets, net
    5       5  
Goodwill
    1,501       1,501  
Total assets
  $ 22,497     $ 23,380  
Liabilities:
               
Current liabilities:
               
Accounts payable
  $ 6,090     $ 8,361  
Other current liabilities
    9,988       7,080  
Total current liabilities
    16,078       15,441  
Long-term liabilities:
               
Other long-term liabilities
    56       137  
Total liabilities
  $ 16,134     $ 15,578  
Schedule of Variable Interest Entity Income [Table Text Block]
   
Three Months Ended
March 31,
 
   
2014
   
2013
 
Revenues
  $ 16,861     $ 10,789  
Operating income
    550       372  
Net income attributable to Sterling common stockholders 
    275       121