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Note 5 - Share-Based Compensation (Detail) (USD $)
1 Months Ended 12 Months Ended
Jan. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Jul. 31, 2009
Mar. 31, 2008
Oct. 31, 2007
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit (in Dollars per share)   $ 0.20        
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit (in Dollars per share)   $ 0.62        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number   588,000 405,020      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross   0 0      
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share)   $ 0 $ 0      
Restricted Stock [Member] | Minimum [Member]
           
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period   3 years        
Restricted Stock [Member] | Maximum [Member]
           
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period   5 years        
Restricted Stock [Member]
           
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number   186,000        
Share-based Compensation (in Dollars)   $ 5,275 $ 1,690      
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized (in Dollars)   15,050        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   0 250,000      
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)   $ 0.09        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period   5,000        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period   59,000        
2007 Stock Incentive Option Plan [Member]
           
Common Stock, Capital Shares Reserved for Future Issuance       345,000 10,000 420,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 5 years 5 years        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number   588,000 405,020      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value (in Dollars)   0 0      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number   102,000 284,980      
Unvested Options Fair Value (in Dollars)   19,140 72,057      
Share-based Compensation (in Dollars)   26,159 26,659      
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized (in Dollars)   $ 15,839 $ 41,998      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 35,000          
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share) $ 0.05