Business Segments and International Operations (Narrative) (Details) $ in Thousands	12 Months Ended
	Nov. 30, 2022 USD ($) segment	Nov. 30, 2021 USD ($)	Nov. 30, 2020 USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of reportable segments | segment	1
Long-lived assets	$ 14,927	$ 14,345
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	7,600	22,100	$ 22,800
Outside United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 7,300	$ 7,500	$ 7,000