Annual report pursuant to Section 13 and 15(d)

Note C - Shareholders' Equity (Details Textual)

v3.3.0.814
Note C - Shareholders' Equity (Details Textual) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Sep. 30, 2015
Jun. 30, 2015
Dec. 31, 2014
Jun. 30, 2014
Dec. 31, 2013
Sep. 30, 2015
Jun. 30, 2015
Sep. 30, 2014
Sep. 30, 2013
Feb. 28, 2010
Minimum [Member] | Employee Stock Option [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period           3 years        
Minimum [Member] | Restricted Stock [Member] | Non Employee Directors [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period           1 year        
Maximum [Member] | Employee Stock Option [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period           5 years        
Maximum [Member] | Restricted Stock [Member] | Non Employee Directors [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period           10 years        
Maximum [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term           6 years        
Employee Stock Option [Member] | Director [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period           1 year        
Cashless Method Stock Option Exercised [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period           56,767        
Director [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term           6 years        
Employee Stock Purchase Plan [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant   165,440         165,440      
Share-based Compensation Arrangement by Share-based Payment Award, Market Price Percentage, Offering Date           85.00%        
Stock Issued During Period, Shares, Employee Stock Purchase Plans   10,119 10,097 6,669 10,920          
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price       $ 14.27 $ 8.28   $ 10.46      
Payments Related to Tax Withholding for Share-based Compensation $ 62,358                  
Preferred Stock, Value, Issued $ 0         $ 0   $ 0    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross           0   0 0  
Preferred Stock, Shares Authorized 500         500   500    
Common Stock, Shares Authorized 50,000,000         50,000,000   50,000,000    
Common Stock, Par or Stated Value Per Share $ 0.01         $ 0.01   $ 0.01    
Temporary Equity, Shares Subscribed but Unissued                   67,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term           1 year 208 days   2 years 229 days    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 354,114         354,114        
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized $ 4,232,496         $ 4,232,496        
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition           9 years 36 days        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number 59,090         59,090        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value           $ 373,271        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price $ 6.32         $ 6.32        
Allocated Share-based Compensation Expense           $ 1,074,727   $ 794,865 $ 753,727  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period           73,167   488,018    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value           $ 876,841   $ 7,522,553    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value $ 2,420,521         $ 2,420,521        
Stock Repurchased During Period, Shares           33,896   16,560    
Treasury Stock Acquired, Average Cost Per Share           $ 16.89   $ 13.61    
Payments Related to Tax Withholding for Share-based Compensation           $ 639,307   $ 399,629 $ 297,988