DISCONTINUED OPERATION (Details 1) - USD ($)	Oct. 31, 2019	Jul. 31, 2019
Discontinued operations
Liabilities from discontinued operations
Advance from customer	$ 19,500	$ 19,500

Amount classified as advance from customer attributable to discontinued operation.

No definition available.

Name:	jrvs_DisposalGroupIncludingDiscontinuedOperationAdvanceFromCustomer
Namespace Prefix:	jrvs_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant