XML 87 R56.htm IDEA: XBRL DOCUMENT v3.8.0.1

Post-employment benefit obligations (Amounts Recognized In Consolidated Statements of Loss and Comprehensive Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of defined benefit plans [abstract]
Current service costs and interest costs included in cost of sales	$ 1,773	$ 1,838

X

- References

No definition available.

+ Details

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

X

- Definition

Current service costs and interest costs included in cost of sales.

+ References

No definition available.

+ Details

Name:	usas_CurrentServiceAndInterestCostsIncludedInCostOfSales
Namespace Prefix:	usas_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration