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Business Segments and International Operations (Narrative) (Details) $ in Thousands | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
May 31, 2021 segment | Nov. 30, 2021 USD ($) | Nov. 30, 2020 USD ($) | Nov. 30, 2019 USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Number of reportable segments | segment | 1 |  |  |
Long-lived assets |  | $ 14,345 | $ 29,817 |
United States |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Long-lived assets |  | 22,100 | 22,800 | $ 25,700
Outside United States |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Long-lived assets |  | $ 7,500 | $ 7,000 | $ 4,100

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