XML 104 R52.htm IDEA: XBRL DOCUMENT v3.20.2
INVENTORIES (Details) - USD ($)
$ in Thousands
Jul. 31, 2020
Jul. 31, 2019
Inventory Disclosure [Abstract]    
Raw materials $ 14,216 $ 21,322
Work-in-process 253 587
Finished goods 885 1,765
Inventory, net $ 15,354 $ 23,674