REVENUE RECOGNITION - Summary of Changes in Deferred Revenue (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
Change in Deferred Revenue
Balance at beginning of period	$ 2,670	$ 2,945
Deferral of revenue	1,959	4,417
Recognition of deferred amounts upon satisfaction of performance obligation	(984)	(1,868)
Balance at end of period	$ 3,645	$ 5,494