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Note 9 - Basic And Diluted Earnings Per Common Share: (Tables)
 6 Months Ended
Jun. 30, 2012
Schedule of Earnings Per Share Reconciliation [Table Text Block]
   
Three months
ended
June 30,
2012
   
Three months
ended
June 30,
2011
   
Six months
ended
June 30,
2012
   
Six months
ended
June 30,
2011
 
Numerator for basic and diluted earnings per common share:
                       
Net income for the period
 
$
695,998
   
$
565,659
   
$
2,359,617
   
$
1,293,605
 
Denominator for basic and diluted earnings per common share:
                               
Basic weighted average number of common shares outstanding
   
45,912,458
     
53,444,841
     
47,003,016
     
53,441,276
 
Effect of outstanding stock options
   
3,536,972
     
2,354,594
     
3,200,147
     
2,343,722
 
Diluted weighted average number of shares outstanding
   
49,449,430
     
55,796,435
     
50,203,163
     
55,784,998
 
Basic earnings per common share
 
$
0.02
   
$
0.01
   
$
0.05
   
$
0.02
 
Diluted earnings per common share
 
$
0.01
   
$
0.01
   
$
0.05
   
$
0.02