Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Stock Based Compensation (Detail)

v2.4.0.6
Note 4 - Stock Based Compensation (Detail) (USD $)
6 Months Ended 15 Months Ended 6 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Mar. 31, 2013
Non Qualified Stock Options [Member]
Mar. 31, 2013
Restricted Stock Awards [Member]
Dec. 31, 2012
Employee Stock Purchase Plan [Member]
Dec. 31, 2011
Employee Stock Purchase Plan [Member]
Share-based Compensation $ 383,732 $ 219,271 $ 219,271        
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized 2,296,775            
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition 4 years 146 days            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)       12,000 9,090    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term 6 years            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period       1 year 1 year    
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share) $ 5.91            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share) $ 5.50     $ 4.12      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term 4 years 109 days            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value 2,950,829            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term 4 years 109 days            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value 2,754,224            
Proceeds from Stock Options Exercised $ 11,971 $ 50,556          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (in Shares) (32,887) 59,190          
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date 85.00%            
Stock Issued During Period, Shares, Employee Stock Purchase Plans (in Shares)           18,000 17,662
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)           $ 3.82 $ 4.09
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares)           220,842