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Note 11 - Stockholders's Equity: (Tables)
9 Months Ended
Sep. 30, 2013
Stockholders' Equity Note [Abstract]  
Schedule of Stockholders Equity [Table Text Block]
   

Common stock

     Additional

paid in

             Accumulated

Other

Comprehensive

     

Total

stockholders'

 
   

Number

   

Amount

   

capital

   

Deficit

   

Income

   

equity

 
                                                 

Balances, June 30, 2013

    40,641,488     $ 9,755,391     $ 28,207,230     $ (16,845,634

)

  $ (402,622 )   $ 20,714,365  
                                                 

Exercise of stock options

    2,935,373       2,041,971       (905,910

)

                1,136,061  

Stock-based compensation

                162,786                   162,786  

Excess tax benefit from stock based payment arrangements

                1,056,014                   1,056,014  

Net income for the period

                      2,593,360             2,593,360  

Unrealized loss on foreign currency forward contracts treated as hedges

                            506,509       506,509  

Reclassification to net income due to settlement of foreign currency forward contracts treated as hedges

                            (12,175 )     (12,175 )
                                                 

Balances, September 30, 2013

    43,576,861     $ 11,797,362     $ 28,520,120     $ (14,252,274

)

  $ 91,712     $ 26,156,920  
   

Common stock

     Additional

paid in

           Accumulated

Other

Comprehensive

     

Total

stockholders'

 
   

Number

   

Amount

   

capital

   

Deficit

   

Income

   

equity

 
                                                 

Balances, December 31, 2012

    44,322,159     $ 10,084,417     $ 33,931,529     $ (17,509,843

)

  $ 44,104     $ 26,550,207  
                                                 

Exercise of stock options

    3,511,946       2,564,447       (1,110,192

)

                1,454,255  

Repurchase and retirement of shares

    (4,114,121

)

    (822,887

)

    (5,454,854

)

                (6,277,741

)

Normal Course Issuer Bid

    (143,073 )     (28,615 )     (231,260 )                 (259,875 )

Cancellation of restricted stock

    (50

)

                             

Stock-based compensation

                328,883                   328,883  

Excess tax benefit from stock based payment arrangements

                1,056,014                   1,056,014  

Net income for the period

                      3,257,569             3,257,569  

Unrealized loss on foreign currency forward contracts treated as hedges

                            63,942       63,942  

Reclassification to net income due to settlement of foreign currency forward contracts treated as hedges

                            (16,334 )     (16,334 )
                                                 

Balances, September 30, 2013

    43,576,861     $ 11,797,362     $ 28,520,120     $ (14,252,274

)

  $ 91,712     $ 26,156,920