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Business Segments and International Operations (Revenue from External Customers from Different Geographical Areas) (Details) - USD ($) $ in Thousands | 3 Months Ended
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Feb. 29, 2020 | Feb. 28, 2019
Revenue from External Customer [Line Items] |  |
Total revenue | $ 109,683 | $ 89,549
North America |  |
Revenue from External Customer [Line Items] |  |
Total revenue | 65,413 | 46,498
EMEA |  |
Revenue from External Customer [Line Items] |  |
Total revenue | 34,988 | 33,372
Latin America |  |
Revenue from External Customer [Line Items] |  |
Total revenue | 4,000 | 4,461
Asia Pacific |  |
Revenue from External Customer [Line Items] |  |
Total revenue | $ 5,282 | $ 5,218
Geographic Concentration Risk | Revenue from Contract with Customer |  |
Revenue from External Customer [Line Items] |  |
Concentration risk, percentage | 100.00% | 100.00%
Geographic Concentration Risk | Revenue from Contract with Customer | North America |  |
Revenue from External Customer [Line Items] |  |
Concentration risk, percentage | 59.00% | 52.00%
Geographic Concentration Risk | Revenue from Contract with Customer | EMEA |  |
Revenue from External Customer [Line Items] |  |
Concentration risk, percentage | 32.00% | 37.00%
Geographic Concentration Risk | Revenue from Contract with Customer | Latin America |  |
Revenue from External Customer [Line Items] |  |
Concentration risk, percentage | 4.00% | 5.00%
Geographic Concentration Risk | Revenue from Contract with Customer | Asia Pacific |  |
Revenue from External Customer [Line Items] |  |
Concentration risk, percentage | 5.00% | 6.00%

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