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Note 5 - Net Income Per Share
 9 Months Ended
Sep. 30, 2014
Earnings Per Share [Abstract]  
Earnings Per Share [Text Block]
5.     Net income per share:

For the three and nine months ended September 30, 2014, outstanding stock options of 205,182 (three months ended September 30, 2013 - 42,592) and 201,411 (nine months ended September 30, 2013 - 144,196) were excluded from the calculation of net income per share attributable to common shareholders because their inclusion would be anti-dilutive.