REVENUE RECOGNITION - Additional Information (Detail) - USD ($) $ in Thousands	Apr. 30, 2020	Jul. 31, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract assets	$ 14,305	$ 21,473
Deferred revenue - current	3,810	2,967
Deferred revenue - long-term	69	62
Total deferred revenue	3,879	3,029
Trade Accounts Receivable
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Accounts receivable, trade, net	$ 83,000	$ 112,141