Restructuring Charges (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Feb. 28, 2019	Feb. 28, 2018	[1]	Nov. 30, 2017	Nov. 30, 2018
Restructuring Cost and Reserve [Line Items]
Global workforce reduction (as a percent)				20.00%
Restructuring expenses	$ 415	$ 1,821
Restructuring reserve					$ 311
Other Accrued Liabilities
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 483

[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.