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Note 10 - Equity Incentive Plan and Stock Based Compensation (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
Apr. 30, 2016
May 31, 2016
May 31, 2015
May 31, 2016
May 31, 2015
Non Qualified Options to Each Director Annually or Upon Election [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized   1,000   1,000  
Restricted Stock [Member] | Employees and Directors [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 5,000     39,000  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period       3 years  
Restricted Stock [Member]          
Allocated Share-based Compensation Expense   $ 28,177 $ 15,339 $ 39,429 $ 28,484
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period       44,000