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9. Income per Share (Tables)
9 Months Ended
Sep. 30, 2016
Income Per Share Tables  
Computation of basic and diluted income per share
    Three Months Ended      Nine Months Ended    
    September 30, 2016     September 30, 2015     September 30, 2016     September 30, 2015  
Numerator:                        
Net income (numerator for basic and diluted earnings per share)   $ 719     $ 212     $ 2,597     $ 829  
Denominator:                                
Denominator for basic earnings per share weighted average shares     13,741,170       13,718,396       13,735,361       13,699,355  
                                 
Effect of dilutive securities:                                
       Options     95,134       75,880       89,895       158,392  
                                 
Denominator:                                
Denominator for diluted earnings per share weighted average shares     13,836,303       13,794,276       13,825,255       13,857,746  
                                 
                                 
Basic income per share   $ 0.05     $ 0.02     $ 0.19     $ 0.06  
Diluted income per share   $ 0.05     $ 0.02     $ 0.19     $ 0.06