SEGMENT INFORMATION - Summarized Financial Information of Net Revenue from External Customers by Group of Services (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2024	Jan. 31, 2023
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	$ 43,045	$ 50,781	$ 84,386	$ 102,140
Mainland China
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	15,371	16,231	29,755	34,196
United States
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	10,994	13,173	21,817	25,345
Netherlands
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	5,787	4,926	11,086	10,277
Czech Republic
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	2,565	7,535	5,195	13,295
Singapore
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	3,987	5,102	7,919	10,234
Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from contracts with customers	$ 4,341	$ 3,814	$ 8,614	$ 8,793