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Note 11 - Variable Interest Entities (Tables)
6 Months Ended
Jun. 30, 2013
Variable Interest Entities [Abstract]  
Schedule of Variable Interest Entities [Table Text Block]
   
June 30,
2013
   
December 31,
2012
 
Assets:
           
Current assets:
           
Cash and cash equivalents
  $ 5,994     $ 7,164  
Contracts receivable, including retainage
    10,756       2,866  
Other current assets
    223       1,214  
Total current assets
    16,973       11,244  
Property and equipment, net
    5,124       3,041  
Other assets, net
    5       --  
Goodwill
    1,501       1,501  
Total assets
  $ 23,603     $ 15,786  
Liabilities:
               
Current liabilities:
               
Accounts payable
  $ 9,776     $ 4,627  
Other current liabilities
    8,427       6,283  
Total current liabilities
    18,203       10,910  
Long-term liabilities:
               
Other long-term liabilities
    --       --  
Total long-term liabilities
    --       --  
Total liabilities
  $ 18,203     $ 10,910  
Schedule of Variable Interest Entity Income [Table Text Block]
   
Three Months Ended
June 30,
   
Six Months Ended
June 30,
 
   
2013
   
2012
   
2013
   
2012
 
Revenues
  $ 25,348     $ 19,056     $ 36,137     $ 23,570  
Operating income
    985       633       1,358       602  
Net income attributable to Sterling common stockholders 
    320       204       441       192