Nature of Business and Summary of Significant Accounting Policies (Summary of Allowances) (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2017
SEC Schedule, 12-09, Allowance, Credit Loss
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 574	$ 498	$ 741
ASC 606 adjustment	0	88	0
Charge to costs and expenses	606	216	204
Write-offs and other	(457)	(232)	(437)
Translation adjustments	(56)	4	(10)
Ending balance	667	574	498
Allowance for Sales Credit Memos
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	266	178	402
ASC 606 adjustment	0	41	0
Charge to costs and expenses	(60)	46	(158)
Write-offs and other	(46)	0	(69)
Translation adjustments	(2)	1	3
Ending balance	$ 158	$ 266	$ 178