Segment reporting (Details)
|12 Months Ended|
Jul. 31, 2021
|Segment Reporting [Abstract]|
|Number of reportable segments||3|
|Segment operates percentage||100.00%|
Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.
Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
Percentage of fair value of reporting unit in excess of carrying amount.
No definition available.