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Note 10 - Stock Based Compensation (Details) (USD $)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Dec. 31, 2010
Dec. 31, 2007
Dec. 31, 2006
Note 10 - Stock Based Compensation (Details) [Line Items]                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term     10 years          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 5,380,756   5,380,756   4,250,000 2,000,000 1,000,000 666,667
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized         2,250,000 1,000,000    
Share-based Compensation (in Dollars) $ 471,481 $ 269,756 $ 734,673 $ 557,021        
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars) 1,600,000   1,600,000          
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition     1 year 255 days          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)     $ 0.98 $ 1.48        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)       $ 2.09        
Proceeds from Stock Options Exercised (in Dollars)     $ 181,337 $ 200,000        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period     55,932 55,932        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross     845,000          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 1,349,808   1,349,808          
Stock Option Plans (Member)
               
Note 10 - Stock Based Compensation (Details) [Line Items]                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross     4,030,948