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Note 9 - Stock Warrants (Tables)
6 Months Ended
Jun. 30, 2013
Stockholders' Equity Note [Abstract]  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
    2013     2012  
   

Warrants

   

Weighted

Average

Exercise Price

   

Warrants

   

Weighted

Average

Exercise Price

 
                                 

Beginning balance

    782,259     $ 0.85       1,235,877     $ 0.35  
                                 

Stock warrants granted

    -       -       -       -  

Stock warrants expired

    -       -       -       -  

Stock warrants exercised

    (427,713 )     0.55       -       -  
                                 

Ending balance

    354,546     $ 1.21       1,235,877     $ 0.35