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Business Segments and International Operations (Revenue from External Customers from Different Geographical Areas) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Feb. 28, 2019 | Feb. 28, 2018
Revenue from External Customer [Line Items] |  |  |
Total revenue | $ 89,549 | $ 95,410 | [1]
North America |  |  |
Revenue from External Customer [Line Items] |  |  |
Total revenue | 46,498 | 52,198 |
EMEA |  |  |
Revenue from External Customer [Line Items] |  |  |
Total revenue | 33,372 | 33,296 |
Latin America |  |  |
Revenue from External Customer [Line Items] |  |  |
Total revenue | 4,461 | 4,942 |
Asia Pacific |  |  |
Revenue from External Customer [Line Items] |  |  |
Total revenue | $ 5,218 | $ 4,974 |
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 | 52.00% | 55.00% |
Geographic Concentration Risk | Revenue from Contract with Customer | EMEA |  |  |
Revenue from External Customer [Line Items] |  |  |
Concentration risk, percentage | 37.00% | 35.00% |
Geographic Concentration Risk | Revenue from Contract with Customer | Latin America |  |  |
Revenue from External Customer [Line Items] |  |  |
Concentration risk, percentage | 5.00% | 5.00% |
Geographic Concentration Risk | Revenue from Contract with Customer | Asia Pacific |  |  |
Revenue from External Customer [Line Items] |  |  |
Concentration risk, percentage | 6.00% | 5.00% |
[1] | The Company adopted ASC 606 effective December 1, 2018 using the full retrospective method. See Note 1. Nature of Business and Basis of Presentation for further information.

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