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Note 11 - Stockholders's Equity: (Details) - Stockholders’ equity transactions (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Jan. 31, 2013
Note 11 - Stockholders's Equity: (Details) - Stockholders’ equity transactions [Line Items]          
Common stock (in Shares)         40,226,875
Common stock, amount     $ 10,084,417    
Additional paid-in capital     33,931,529    
Deficit     (17,509,843)    
Accumulated Other Comprehensive Income     44,104    
Total stockholders' equity 20,714,365   26,550,207    
Exercise of stock options (in Shares) 2,935,373 20,187 3,511,946 693,340  
Exercise of stock options 1,136,061   1,454,255    
Common stock - Amount     6,277,741    
Total stockholders equity     (6,277,741)    
Stock-based compensation 162,786   328,883    
Excess tax benefit from stock based payment arrangements 1,056,014   1,056,014    
Net income for the period 2,593,360 1,635,000 3,257,569 3,994,617  
Net income for the period 2,593,360 1,635,000 3,257,569 3,994,617  
Unrealized loss on foreign currency forward contracts treated as hedges 506,509   63,942    
Reclassification to net income due to settlement of foreign currency forward contracts treated as hedges (12,175)   (16,334)    
Reclassification to net income due to settlement of foreign currency forward contracts treated as hedges (12,175)   (16,334)    
Common stock (in Shares)         40,226,875
Common stock, amount 11,797,362   11,797,362    
Additional paid-in capital 28,520,120   28,520,120    
Deficit (14,252,274)   (14,252,274)    
Accumulated Other Comprehensive Income 91,712   91,712    
Total stockholders' equity 26,156,920   26,156,920    
Common Stock [Member] | Normal Course Issuer Bid Member
          
Note 11 - Stockholders's Equity: (Details) - Stockholders’ equity transactions [Line Items]          
Common stock - Number (in Shares)     (143,073)    
Common stock - Amount     (28,615)    
Total stockholders equity     28,615    
Common Stock [Member]
          
Note 11 - Stockholders's Equity: (Details) - Stockholders’ equity transactions [Line Items]          
Common stock (in Shares) 40,641,488   44,322,159    
Common stock, amount 9,755,391   10,084,417    
Cancellation of restricted stock (in Shares)     (50)    
Exercise of stock options (in Shares) 2,935,373   3,511,946    
Exercise of stock options, amount 2,041,971   2,564,447    
Common stock - Number (in Shares)     (4,114,121)    
Common stock - Amount     (822,887)    
Total stockholders equity     822,887    
Common stock (in Shares) 43,576,861   43,576,861    
Common stock, amount 11,797,362   11,797,362    
Additional Paid-in Capital [Member] | Normal Course Issuer Bid Member
          
Note 11 - Stockholders's Equity: (Details) - Stockholders’ equity transactions [Line Items]          
Additional paid in capital     (231,260)    
Additional Paid-in Capital [Member]
          
Note 11 - Stockholders's Equity: (Details) - Stockholders’ equity transactions [Line Items]          
Additional paid-in capital 28,207,230   33,931,529    
Exercise of stock options (905,910)   (1,110,192)    
Additional paid in capital     (5,454,854)    
Stock-based compensation 162,786   328,883    
Excess tax benefit from stock based payment arrangements 1,056,014   1,056,014    
Additional paid-in capital 28,520,120   28,520,120    
Retained Earnings [Member]
          
Note 11 - Stockholders's Equity: (Details) - Stockholders’ equity transactions [Line Items]          
Deficit (16,845,634)   (17,509,843)    
Net income for the period 2,593,360   3,257,569    
Net income for the period 2,593,360   3,257,569    
Deficit (14,252,274)   (14,252,274)    
Accumulated Other Comprehensive Income (Loss) [Member]
          
Note 11 - Stockholders's Equity: (Details) - Stockholders’ equity transactions [Line Items]          
Accumulated Other Comprehensive Income (402,622)   44,104    
Unrealized loss on foreign currency forward contracts treated as hedges 506,509   63,942    
Reclassification to net income due to settlement of foreign currency forward contracts treated as hedges (12,175)   (16,334)    
Reclassification to net income due to settlement of foreign currency forward contracts treated as hedges (12,175)   (16,334)    
Accumulated Other Comprehensive Income 91,712   91,712    
Normal Course Issuer Bid Member
          
Note 11 - Stockholders's Equity: (Details) - Stockholders’ equity transactions [Line Items]          
Common stock - Amount     259,875    
Total stockholders equity     $ (259,875)