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INVENTORIES - Components of Inventories (Detail) - USD ($)
$ in Thousands
Jan. 31, 2020
Jul. 31, 2019
Inventory Disclosure [Abstract]    
Raw materials $ 21,631 $ 21,322
Work-in-process 428 587
Finished goods 2,182 1,765
Inventories, net $ 24,241 $ 23,674