REVENUE RECOGNITION - Additional Information (Detail) - USD ($) $ in Thousands	Apr. 30, 2021	Jul. 31, 2020	Apr. 30, 2020	Jul. 31, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract assets	$ 17,176	$ 13,016
Deferred revenue - current	2,748	2,860
Deferred revenue - long-term	168	85
Total deferred revenue	2,916	2,945	$ 3,879	$ 3,029
Accounts receivable, trade, net
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Accounts receivable, trade, net	$ 72,048	$ 93,072