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Note 4 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Aug. 31, 2022 | Nov. 30, 2022 | Nov. 30, 2021 | Nov. 30, 2020
Goodwill, Impairment Loss | $ 0 |  |  |
Restricted Cash, Current |  | $ 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 |  |
Advertising Expense |  | $ 5,500 | 2,700 |
Research and Development Expense, Total |  | 500 | 300 |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total |  | $ 0 | 0 |
Customer Lists [Member] |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  | 2 years |  |
Minimum [Member] | Patents [Member] |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  | 10 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] |  |  |  |
Accounts Receivable, Allowance for Credit Loss, Ending Balance |  | $ 20 | $ 20 | $ 20
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) |  | 5 years |  |
Maximum [Member] | Leasehold Improvements [Member] |  |  |  |
Property, Plant and Equipment, Useful Life (Year) |  | 7 years |  |

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