Business Segments and International Operations (Revenue from External Customers from Different Geographical Areas) (Details) - USD ($) $ in Thousands	3 Months Ended
	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%