Goodwill and intangible assets (Details) - Schedule of Useful Lives For Acquisitions - Customer Relationships [Member]	3 Months Ended
	Oct. 31, 2020
Goodwill and intangible assets (Details) - Schedule of Useful Lives For Acquisitions [Line Items]
Weighted average remaining useful life	2 years
Minimum [Member]
Goodwill and intangible assets (Details) - Schedule of Useful Lives For Acquisitions [Line Items]
Useful life assigned	8 years
Maximum [Member]
Goodwill and intangible assets (Details) - Schedule of Useful Lives For Acquisitions [Line Items]
Useful life assigned	15 years