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Note 10 - Net Loss Per Share Attributable to Sterling Common Stockholders (Tables)
3 Months Ended
Mar. 31, 2016
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
    Three Months Ended
March 31,
    2016   2015
Numerator:                
Net loss attributable to Sterling common stockholders   $ (7,328 )   $ (16,992 )
                 
Denominator:                
Weighted average common shares outstanding — basic     19,760       18,902  
Shares for dilutive unvested stock     -       -  
Weighted average common shares outstanding and incremental shares assumed repurchased— diluted     19,760       18,902  
Basic and diluted loss per share attributable to Sterling common stockholders   $ (0.37 )   $ (0.90 )