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Note 11 - Equity Incentive Plan and Stock Based Compensation (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Aug. 31, 2017
Aug. 31, 2016
Aug. 31, 2017
Aug. 31, 2016
Jan. 27, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 0 0 0 0  
Allocated Share-based Compensation Expense $ 19,266 $ 31,417 $ 92,225 $ 70,846  
Non-qualified Stock Units to Non-employee Directors Annually or Upon Election [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized         1,000
Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     3 years    
Restricted Stock [Member] | Employees, Directors, and Consultants [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     53,700    
Restricted Stock [Member] | Director [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period     4,000