FAIR VALUE MEASUREMENTS - Financial Assets Measured at Fair Value on Recurring Basis and Classified by Fair Value Hierarchy (Details) - Fair Value, Measurements, Recurring - Money market funds - USD ($) $ in Thousands	Apr. 30, 2023	Jul. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure, recurring	$ 31,716	$ 31,756
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure, recurring	31,716	31,756
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure, recurring	0	0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value disclosure, recurring	$ 0	$ 0