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Note 12 - Commitments and Contingencies (Details Textual) - USD ($)
12 Months Ended
Aug. 31, 2018
Nov. 30, 2018
Nov. 30, 2017
Accrued Bonuses   $ 450,000 $ 318,000
Entity Wide Trade Joint Venture Receivables, Three Joint Ventures,Percentage 74.10% 71.30%  
Fiscal 2018 Bonus Plan [Member] | Executive Officer [Member]      
Percentage of Individual Bonus Payout Determined by Actual Versus Targeted EBITOI Results 75.00%    
Percentage of Individuals Payout Determined Upon Achievement of Certain Pre-Established Individual Performance Objectives 25.00%