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Note 10 - Stock-Based Compensation (Detail) (USD $)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Dec. 31, 2010
Feb. 10, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 12,000,000   12,000,000       12,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Description         Options granted under the 2011 Plan to employees generally vest over a three-year period with 1/3 of the shares vesting after one year from the date of grant and 1/36 of the shares vesting monthly thereafter. Option awards to non-employee directors may vest fully upon grant or quarterly over one year. All option awards have a maximum term of ten years and exercise prices equal to the closing market price of the Company's common stock on the grant date.    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights           Options granted under the 2000 Plan generally became exercisable over periods ranging from one to three years, have a maximum term of ten years and exercise prices equal to the closing market price of the Company's common stock on the grant date. Effective November 6, 2010, additional option awards under the 2000 Plan were discontinued. The 2000 Plan will remain in effect as to outstanding options granted prior to November 6, 2010.  
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period   87,000 1,200,000 257,000      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)   $ 0.13 $ 0.23 $ 0.21      
Share-based Compensation (in Dollars) $ 33,171 $ 14,015 $ 185,109 $ 132,964 $ 149,468    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options (in Dollars) 180,344   180,344        
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition     2 years 36 days        
Closing Stock Price (in Dollars per share) $ 0.23   $ 0.23        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 10,393,000   10,393,000        
Fully Vested Options Granted to Executives [Member]
             
Share-based Compensation (in Dollars)     $ 92,240