Annual report pursuant to Section 13 and 15(d)

Note 4 - Summary of Significant Accounting Policies (Details Textual)

v3.22.0.1
Note 4 - Summary of Significant Accounting Policies (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Aug. 31, 2021
Nov. 30, 2021
Nov. 30, 2020
Goodwill, Impairment Loss $ 0    
Restricted Cash, Current   $ 92 $ 6,389
Restricted Cash, Noncurrent   0 92
Accounts Receivable, Allowance for Credit Loss, Ending Balance   10 10
Tangible Asset Impairment Charges, Total   $ 0 $ 0
Standard Product Warranty, Term (Year)   1 year  
Extended Product Warranty, Term (Year)   3 years 3 years
Loss Contingency Accrual, Ending Balance   $ 300  
Advertising Expense   2,700 $ 1,000
Research and Development Expense, Total   300 40
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total   $ 0 $ 0
Minimum [Member] | Patents [Member]      
Finite-Lived Intangible Asset, Useful Life (Year)   15 years  
Minimum [Member] | Computer Equipment and Software [Member]      
Property, Plant and Equipment, Useful Life (Year)   3 years  
Minimum [Member] | Leasehold Improvements [Member]      
Property, Plant and Equipment, Useful Life (Year)   3 years  
Maximum [Member] | Patents [Member]      
Finite-Lived Intangible Asset, Useful Life (Year)   17 years  
Maximum [Member] | Computer Equipment and Software [Member]      
Property, Plant and Equipment, Useful Life (Year)   7 years  
Maximum [Member] | Leasehold Improvements [Member]      
Property, Plant and Equipment, Useful Life (Year)   7 years