Significant Accounting Policies - Estimated Useful Lives of Assets (Details)	12 Months Ended
Jul. 31, 2021
Computer equipment and capitalized software
Property, Plant and Equipment [Line Items]
Estimated useful lives of assets	3 years
Office furniture and equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives of assets	5 years
Buildings
Property, Plant and Equipment [Line Items]
Estimated useful lives of assets	25 years

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

No definition available.

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration