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Note 8 - Common Stock (Tables)
12 Months Ended
Dec. 31, 2014
Notes Tables  
Schedule of Conversions of Convertible Preferred Stock [Table Text Block]
   
2014
   
2013
   
2012
 
Conversion of Series A Preferred Shares
    202,857       2,048,570       1,882,667  
Conversion of Series B Preferred Shares
    4,428,571       -0-       -0-  
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]
Expiration Date
 
Number of Shares
   
Weighted Average
Exercise Price
 
December 31, 2016
    1,806,159     $ 1.00  
January 16, 2017
    45,000       1.00  
January 31, 2017
    567,001       1.00  
March 21, 2017
    2,690,666       0.35  
Total Outstanding at December 31, 2014
    5,108,826     $ 0.66  
Schedule of Stock by Class [Table Text Block]
Stock Purchase Warrants
    5,108,826  
Stock Option Plan
    1,197,529  
Series B Convertible Preferred Stock
    285,715  
Total
    6,592,070