Business Segments and International Operations (Revenue from External Customers from Different Geographical Areas) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Nov. 30, 2019	Aug. 31, 2019	May 31, 2019	Feb. 28, 2019	Nov. 30, 2018	Aug. 31, 2018	May 31, 2018	Feb. 28, 2018	Nov. 30, 2019	Nov. 30, 2018		Nov. 30, 2017
Revenue from External Customer [Line Items]
Total revenue	$ 117,038	$ 106,716	$ 99,995	$ 89,549	$ 98,104	$ 92,603	$ 92,864	$ 95,410	$ 413,298	$ 378,981	[1]	$ 389,154	[1]
United States
Revenue from External Customer [Line Items]
Total revenue									213,252	187,627		214,232
Canada
Revenue from External Customer [Line Items]
Total revenue									20,659	16,630		21,583
EMEA
Revenue from External Customer [Line Items]
Total revenue									137,301	135,055		117,509
Latin America
Revenue from External Customer [Line Items]
Total revenue									19,665	18,046		16,002
Asia Pacific
Revenue from External Customer [Line Items]
Total revenue									$ 22,421	$ 21,623		$ 19,828

[1] The Company adopted the accounting standard related to revenue recognition ("ASC 606") effective December 1, 2018 using the full retrospective method. See Note 1. Nature of Business and Summary of Significant Accounting Policies for further information.