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5. Earnings per share (Tables)
6 Months Ended
Jun. 30, 2014
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended
   
Six Months Ended
   
June 30,
   
June 30,
   
2014
   
2013
   
2014
   
2013
   
(In thousands, except per share data)
                       
Net income
  $ 175     $ 1,215     $ 569     $ 2,375
                               
Shares:
                             
Basic:  Weighted average common shares outstanding
    8,376       8,728       8,374       8,722
Add:  Dilutive effect of outstanding options as determined by the
        treasury stock method
    144       74       164       81
Diluted:  Weighted average common and common equivalent shares outstanding
    8,520       8,802       8,538       8,803
                               
Net income per common share:
                             
Basic
  $ 0.02     $ 0.14     $ 0.07     $ 0.27
Diluted
  $ 0.02     $ 0.14     $ 0.07     $ 0.27