DEFINED BENEFIT PENSION PLANS - Components of Net Periodic Pension Cost (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2020	Jul. 31, 2019
Retirement Benefits [Abstract]
Service cost	$ 185	$ 365
Interest costs	543	633
Expected return on plan assets	(458)	(492)
Amortization of net actuarial loss	74	127
Curtailment gain	(143)	0
Net periodic pension costs	$ 201	$ 633
Pension plans	us-gaap:PensionPlansDefinedBenefitMember