XML 113 R82.htm IDEA: XBRL DOCUMENT v3.8.0.1

Segmented and geographic information, and major customers (Major Customers) (Details)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Major Customer One [Member]
Disclosure of major customers [line items]
Percentage of revenue	60.00%	59.00%
Major Customer Two [Member]
Disclosure of major customers [line items]
Percentage of revenue	40.00%	31.00%
Major Customer Three [Member]
Disclosure of major customers [line items]
Percentage of revenue		9.00%
Major Customer Four [Member]
Disclosure of major customers [line items]
Percentage of revenue		1.00%

X

- Definition

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.

+ References

No definition available.

+ Details

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

X

- Definition

The percentage of the entity's revenue. [Refer: Revenue]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 8
-IssueDate 2017-01-01
-Paragraph 34
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2017-03-01&anchor=para_34&doctype=Standard
-URIDate 2017-03-09

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_MajorCustomersAxis=usas_MajorCustomerOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_MajorCustomersAxis=usas_MajorCustomerTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_MajorCustomersAxis=usas_MajorCustomerThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_MajorCustomersAxis=usas_MajorCustomerFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: