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Business Segments and International Operations (Narrative) (Details) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Nov. 30, 2020 USD ($) segment | Nov. 30, 2019 USD ($) | Nov. 30, 2018 USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Number of reportable segments | segment | 3 |  |
Long-lived assets | $ 29,817 | $ 29,765 |
United States |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Long-lived assets | 22,800 | 25,700 | $ 25,800
Outside United States |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Long-lived assets | $ 7,000 | $ 4,100 | $ 4,900

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