SEGMENT INFORMATION - Summarized Financial Information of Net Revenue from External Customers by Group of Services (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2023	Apr. 30, 2022	Apr. 30, 2023	Apr. 30, 2022
Segment Reporting, Revenue Reconciling Item [Line Items]
Total segment net revenue	$ 46,142	$ 51,548	$ 148,283	$ 150,223
Mainland China
Segment Reporting, Revenue Reconciling Item [Line Items]
Total segment net revenue	13,852	17,858	48,049	53,248
United States
Segment Reporting, Revenue Reconciling Item [Line Items]
Total segment net revenue	12,917	13,183	38,262	37,336
Czech
Segment Reporting, Revenue Reconciling Item [Line Items]
Total segment net revenue	6,202	5,004	19,497	11,761
Singapore
Segment Reporting, Revenue Reconciling Item [Line Items]
Total segment net revenue	4,705	4,739	14,940	14,655
Netherlands
Segment Reporting, Revenue Reconciling Item [Line Items]
Total segment net revenue	4,872	6,180	15,149	18,056
Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Total segment net revenue	$ 3,594	$ 4,584	$ 12,386	$ 15,167