SEGMENT INFORMATION - Summarized Financial Information of Net Revenue from External Customers by Group of Services (Details) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2023	Oct. 31, 2022
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	$ 41,341	$ 51,359
United States
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	15,197	12,172
Mainland China
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	14,384	17,965
Netherlands
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	5,298	5,351
Czech Republic
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	2,630	5,760
Singapore
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	1,460	5,132
Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	$ 2,372	$ 4,979