REVENUE RECOGNITION - Summary of Changes in Deferred Revenue (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2021	Jul. 31, 2020
Change in Deferred Revenue
Balance at beginning of period	$ 2,945	$ 3,029
Deferral of revenue	5,266	4,310
Recognition of deferred amounts upon satisfaction of performance obligation	(5,541)	(4,394)
Balance at end of period	$ 2,670	$ 2,945