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Business Segments and International Operations (Narrative) (Details) $ in Thousands	12 Months Ended
	Nov. 30, 2018 USD ($) segment	Nov. 30, 2017 USD ($)	Nov. 30, 2016 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment	3
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 30,714	$ 42,261
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	25,800	39,500	$ 45,400
Outside United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 4,900	$ 2,800	$ 4,700

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- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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