v3.25.4

Property Plant and Equipment (Details Narrative) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Non-producing properties [Member]
Statement [Line Items]
Carrying amount	$ 12.5
Right-of-use assets [Member]
Statement [Line Items]
Carrying amount	0.1	$ 0.7
Mineral interests [member]
Statement [Line Items]
Carrying amount	16.0	16.0
Plant and equipment [Member]
Statement [Line Items]
Carrying amount	$ 5.1	$ 7.0

X

- Definition

The fair value of property, plant and equipment when the fair value is materially different from the carrying amount. [Refer: Carrying amount [member]; Property, plant and equipment]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 16
-IssueDate 2024-01-01
-Paragraph 79
-Subparagraph d
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_79_d&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_FairValueOfPropertyPlantAndEquipmentMateriallyDifferentFromCarryingAmount
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- References

No definition available.

+ Details

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

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=usas_NonproducingPropertiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=usas_RightofUseAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=usas_MineralInterestsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=usas_PlantAndEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: