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Note 7 - Warrants (Tables)
3 Months Ended
Mar. 31, 2013
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
   
Number of
Shares
   
Price Range
 
Outstanding as of December 31, 2011
   
7,280,683
   
$0.125
2.00  
Issued
   
1,603,993
   
 
$0.50
   
Exercised
   
   
 
$
   
Expired
   
     
$
   
               
Outstanding as of March 31, 2012
   
8,884,676
   
$0.125
1.00  
   
Number of
Shares
   
Price Range
 
Outstanding as of December 31, 2012
   
8,390,741
   
$0.125
1.00  
Issued
   
1,366,664
   
 
$0.55
   
Exercised
   
   
 
$
   
Expired
   
(1,225,898)
   
 
$1.00
   
               
Outstanding as of March 31, 2013
   
8,531,507
   
$0.125
1.00  
Schedule of Assumptions Used to Determine Fair Value of Warrants [Table Text Block]
   
2012
   
2013
 
Risk free interest rate
   .22 
1.87%
     
%
Expected volatility
    150
558%
     
%
Expected dividend yield
   
N/A
       
 
Forfeiture rate
   
N/A
       
 
Expected life in years
    0.50
3.00      
2.5