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Note 7 - Derivative Instrument Assets And Liabilities (Tables)
 6 Months Ended
Jun. 30, 2012
Schedule of Derivative Instruments [Table Text Block]
Maturity date
 
Notional
amount of
U.S. dollars
   
Weighted
average
exchange rate
of U.S. dollars
   
Fair value
 
                   
July – September, 2012
   
5,100,000
     
0.9855
     
(163,215)
 
October – December, 2012
   
5,100,000
     
0.9855
     
(173,130)
 
January – March, 2013
   
6,000,000
     
1.0277
     
33,987
 
April – May, 2013
   
4,000,000
     
1.0385
     
59,241
 
Total
 
$
20,200,000
     
1.0085
   
$
(243,117)