Summary of significant accounting policies (Details)	9 Months Ended
Apr. 30, 2024 item
Summary of significant accounting policies
Number of reporting units	1

Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

No definition available.

Name:	us-gaap_NumberOfReportingUnits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration