Quarterly report pursuant to Section 13 or 15(d)

Note 20 - Related Party Transactions (Details Textual)

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Note 20 - Related Party Transactions (Details Textual) - USD ($)
$ in Thousands
 3 Months Ended 7 Months Ended 9 Months Ended 12 Months Ended
Aug. 31, 2021
Aug. 31, 2020
Jun. 30, 2020
Aug. 31, 2021
Aug. 31, 2020
Nov. 30, 2018
Nov. 30, 2020
Share-based Payment Arrangement, Expense $ 1,000 $ 10   $ 2,500 $ 700    
Stock Issued During Period, Value, Purchase of Assets         693    
Chief Executive Officer [Member]              
Related Party Transaction, Amounts of Transaction   10     20    
Related Party Transaction, Monthly Amounts of Transaction     $ 2        
Andre Buys [Member]              
Related Party Transaction, Amounts of Transaction       300 50    
Due to Related Parties, Total 100     100     $ 200
Share-based Payment Arrangement, Expense $ 0 $ 4   $ 6 $ 10    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures, Total (in shares)           150,000  
Andre Buys [Member] | Patents [Member]              
Stock Issued During Period, Shares, Purchase of Assets (in shares)       386,681      
Stock Issued During Period, Value, Purchase of Assets       $ 700