v3.25.4

Income taxes (Details Narrative)	9 Months Ended	12 Months Ended
	Sep. 30, 2025	Dec. 31, 2024
Income taxes
Weighted average annual income tax rate	26.50%	26.50%

X

- Definition

The applicable income tax rate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2024-01-01
-Paragraph 81
-Subparagraph c
-Clause ii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2024-en-r&anchor=para_81_c_ii&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_ApplicableTaxRate
Namespace Prefix:	ifrs-full_
Data Type:	dtr-2022:percentItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	usas_DisclosureOfIncomeTaxesAbstract
Namespace Prefix:	usas_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration