Mining Interest, Plant and Equipment - Summary of Details of Transaction (Parenthetical) (Detail) - $ / CAD	Nov. 08, 2017	Mar. 21, 2017
San Pedrito [member]
Disclosure of detailed information about property, plant and equipment [line items]
Exchange rate	15.01	14.28

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

No definition available.

Name:	ifrs-full_DisclosureOfPropertyPlantAndEquipmentLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration