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Note 15 - Net Loss Per Share Attributable to Sterling Common Stockholders
 12 Months Ended
Dec. 31, 2014
Earnings Per Share [Abstract]  
Earnings Per Share [Text Block]
15.  
Net Loss Per Share Attributable to Sterling Common Stockholders

Basic net loss per share attributable to Sterling common stockholders is computed by dividing net loss attributable to Sterling common stockholders by the weighted average number of common shares outstanding during the period. Diluted net loss per common share attributable to Sterling common stockholders is the same as basic net loss per share attributable to Sterling common stockholders but assumes the exercise of dilutive unvested common stock and stock options using the treasury stock method. The following table reconciles the numerators and denominators of the basic and diluted per common share computations for net loss attributable to Sterling common stockholders for 2014, 2013 and 2012 (amounts in thousands, except per share data):

   
Years Ended December 31,
 
   
2014
   
2013
   
2012
 
Numerator:
                 
Net loss attributable to Sterling common stockholders
  $ (9,781 )   $ (73,929 )   $ (297 )
Revaluation of noncontrolling interest put/call liability reflected in additional paid in capital or retained earnings, net of tax
    -       (7,686 )     (3,992 )
    $ (9,781 )   $ (81,615 )   $ (4,289 )
Denominator:
                       
Weighted average common shares outstanding — basic
    18,063       16,635       16,421  
Shares for dilutive stock options and warrants
    -       -       -  
Weighted average common shares outstanding and assumed
conversions— diluted
    18,063       16,635       16,421  
Basic and diluted net loss per share attributable to Sterling common stockholders
  $ (0.54 )   $ (4.91 )   $ (0.26 )

The Company had no options outstanding but considered antidilutive due to the option exercise price exceeding the average share market price at December 31, 2014, 2013 and 2012, respectively. In addition, 152,900, 160,206 and 109,424 shares for unvested stock and stock options were excluded from the diluted weighted average common shares outstanding in 2014, 2013 and 2012, respectively, as the Company incurred a loss in these years and the impact of such shares would have been antidilutive.