Business Segments and International Operations (Narrative) (Details) $ in Thousands	12 Months Ended
	Nov. 30, 2019 USD ($) segment	Nov. 30, 2018 USD ($)		Nov. 30, 2017 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment	3
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 29,765	$ 30,714	[1]
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	25,700	25,800		$ 39,500
Outside United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 4,100	$ 4,900		$ 2,800

[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.