XML 67 R36.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Weighted average basic and diluted number of common shares outstanding (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Weighted average basic and diluted number of common shares outstanding [abstract] |
Schedule of Weighted Average Basic and Diluted Number of Common Shares Outstanding |
|  | Year ended |  |  | Year ended |
|  | December 31, |  |  | December 31, |
|  | 2017 |  |  | 2016 |
Basic weighted average number of shares |  |  | 40,194,660 |  |  |  | 34,526,435 |
Effect of dilutive stock options and warrants |  |  | - |  |  |  | - |
Diluted weighted average number of shares |  |  | 40,194,660 |  |  |  | 34,526,435 |

X
- Definition The disclosure of detailed information about weighted average basic and diluted number of common shares outstanding. + References No definition available. + Details
Name: | usas_DisclosureOfDetailedInformationAboutWeightedAverageBasicAndDilutedNumberOfCommonSharesOutstandingExplanatory
Namespace Prefix: | usas_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | usas_WeightedAverageBasicAndDilutedNumberOfCommonSharesOutstandingAbstract
Namespace Prefix: | usas_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration