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Note 8. Shareholders’ Equity (Tables)
9 Months Ended
Sep. 30, 2011
Schedule of Dividend Payment Restrictions [Table Text Block]
Quarterly average realized
silver price per ounce
 
Quarterly dividend
per share
 
Annual dividend
per share
$ 30  
$0.01
 
$0.04
$ 35  
$0.02
 
$0.08
$ 40  
$0.03
 
$0.12
$ 45  
$0.04
 
$0.16
$ 50  
$0.05
 
$0.20
$ 55  
$0.06
 
$0.24
$ 60  
$0.07
 
$0.28
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
Warrants Outstanding
 
Warrants
   
Exercise Price
 
Expiration Date
Series 1 warrants
  $ 5,200,519     $ 2.45  
June 2014
Series 1 warrants
    460,976       2.56  
June 2014
Series 3 warrants
    16,944,378       2.50  
August 2014
Total warrants outstanding
    22,605,873