Quarterly report pursuant to Section 13 or 15(d)

Note 8 - Revenue, Deferred Revenue and Accounts Receivable (Details Textual)

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Note 8 - Revenue, Deferred Revenue and Accounts Receivable (Details Textual) - USD ($)
$ in Thousands
 9 Months Ended
Aug. 31, 2022
Nov. 30, 2021
Standard Product Warranty, Term (Year) 1 year  
Extended Product Warranty, Term (Year) 3 years  
Accounts Receivable, Allowance for Credit Loss, Ending Balance $ 10 $ 10