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Nature of Business and Summary of Significant Accounting Policies (Summary of Allowances) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Nov. 30, 2020
Nov. 30, 2019
Nov. 30, 2018
SEC Schedule, 12-09, Allowance, Credit Loss      
Accounts Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance $ 667 $ 574 $ 498
ASC 606 adjustment 0 0 88
Charge to costs and expenses 429 606 216
Write-offs and other (169) (457) (232)
Translation adjustments (41) (56) 4
Ending balance 886 667 574
Allowance for Sales Credit Memos      
Accounts Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance 158 266 178
ASC 606 adjustment 0 0 41
Charge to costs and expenses 265 (60) 46
Write-offs and other 0 (46) 0
Translation adjustments 6 (2) 1
Ending balance $ 429 $ 158 $ 266