SIGNIFICANT ACCOUNTING POLICIES - Fair Value of Financial Instruments (Detail) - Fair Value, Recurring - USD ($) $ in Thousands	May 31, 2022	Aug. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Acquisition-related contingent consideration obligations	$ 0	$ 3,217
Level 1
Defined Benefit Plan Disclosure [Line Items]
Acquisition-related contingent consideration obligations	0	0
Level 2
Defined Benefit Plan Disclosure [Line Items]
Acquisition-related contingent consideration obligations	0	0
Level 3
Defined Benefit Plan Disclosure [Line Items]
Acquisition-related contingent consideration obligations	0	3,217
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Assets, fair value disclosure	42,353	36,984
Cash and cash equivalents | Level 1
Defined Benefit Plan Disclosure [Line Items]
Assets, fair value disclosure	42,353	36,984
Cash and cash equivalents | Level 2
Defined Benefit Plan Disclosure [Line Items]
Assets, fair value disclosure	0	0
Cash and cash equivalents | Level 3
Defined Benefit Plan Disclosure [Line Items]
Assets, fair value disclosure	0	0
Short-term investments
Defined Benefit Plan Disclosure [Line Items]
Assets, fair value disclosure	79,801	86,484
Short-term investments | Level 1
Defined Benefit Plan Disclosure [Line Items]
Assets, fair value disclosure	79,801	86,484
Short-term investments | Level 2
Defined Benefit Plan Disclosure [Line Items]
Assets, fair value disclosure	0	0
Short-term investments | Level 3
Defined Benefit Plan Disclosure [Line Items]
Assets, fair value disclosure	$ 0	$ 0