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Schedule II - Valuation and Qualifying Accounts and Reserves (Details) - USD ($)
$ in Thousands
 12 Months Ended
Oct. 31, 2020
Oct. 31, 2019
Oct. 31, 2018
Schedule II - Valuation and Qualifying Accounts and Reserves      
Allowance for Doubtful Accounts Receivable, Beginning Balance $ 891 $ 1,027 $ 639
Charged to Costs and Expenses 575   394
Recovered from Costs and Expenses   (136)  
Deductions [1] 65   6
Allowance for Doubtful Accounts Receivable, Ending Balance 1,401 891 1,027
Income tax valuation allowance Balance at Beginning of Period 2,227 2,106 2,282
Charged to/ (Recovered from) Costs and Expenses 50 458 253
Deductions 113 337 429
Income tax valuation allowance Balance at End of Period $ 2,164 $ 2,227 $ 2,106
[1] Receivable write–offs