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.