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Inventories and major vendors - Components of Inventories (Detail) - USD ($)
$ in Thousands
Jul. 31, 2018
Oct. 31, 2017
Inventory [Line Items]    
Raw materials and supplies $ 2,867 $ 2,520
Work in process 389 194
Finished goods 3,598 3,395
Totals $ 6,854 $ 6,109