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Note 3 - Share Based Compensation (Details) - Share Based Compensation Expense (USD $)
3 Months Ended 12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Dec. 31, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Share-based compensation expense $ 12,447 $ 20,741 $ 49,842 $ 57,180
Selling, General and Administrative Expenses [Member]
       
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Share-based compensation expense 11,121 2,223 22,502 12,054
Research and Development Expense [Member]
       
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]        
Share-based compensation expense $ 1,326 $ 18,518 $ 27,340 $ 45,126