Cost of sales (Narrative) (Details) $ in Millions	12 Months Ended
Dec. 31, 2025 USD ($)
Disclosure Of Cost Of Sales [Abstract]
Costs before salaries and employee benefits	$ 5.8

Amount of costs before salaries and employee benefits.

No definition available.

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