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Note 8 - Stock Options and Awards (Detail) (USD $)
12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2007
Dec. 31, 2003
Dec. 31, 1997
Dec. 31, 1991
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized     250,000 200,000 199,650 332,750
Share-based Compensation (in Dollars) $ 92,000 $ 169,000        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 1,750 1,750        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 38,000 37,000        
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate 2.92% 0.00%        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share) $ 3.43 $ 2.27        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value (in Dollars) 0 0        
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized (in Dollars) 95,000          
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition 2 years 135 days          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value (in Dollars) $ 141,000 $ 154,000        
Non-qualified Stock Options [Member]
           
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 4 years          
Share-Based Compensation Arrangement by Share-Based Payment Award Expiration 10 years          
Stock Incentive Plans [Member]
           
Share-Based Compensation Arrangement by Share-Based Payment Award Expiration 10 years          
Nonvested Stock Awards [Member] | Director [Member]
           
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 1 year          
Nonvested Stock Awards [Member] | Officer [Member]
           
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 4 years          
Nonvested Stock Awards [Member] | Chief Executive Officer [Member]
           
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years          
Director [Member]
           
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 6 months          
Share-Based Compensation Arrangement by Share-Based Payment Award Expiration 3 years          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 10,000 10,000        
Officer [Member]
           
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 28,000 27,000        
The 2003 Plan [Member]
           
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 12,000          
The 2007 Plan [Member]
           
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 129,283          
All Plans [Member]
           
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 141,283