Inventories (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Classes of current inventories [Abstract]
Inventories recognized in cost of sales	$ 84.9	$ 82.7
Ore stockpiles write-down to net realizable value	$ 3.7	$ 1.3

It represents the ore on leach pads and ore stockpiles written down to net realizable value.

No definition available.

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