Basis of Preparation of Financial Statements and Nature of Operations (Details)	3 Months Ended
Mar. 31, 2024 property
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Number of additional selected properties advanced in portfolio	11
Rodeo Property
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Investment ownership percentage	100.00%
Velardena Properties
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Investment ownership percentage	100.00%
El Quevar mining concessions
Research and Development Arrangement, Contract to Perform for Others [Line Items]
Investment ownership percentage	100.00%

Represents the number of additional selected properties advanced in portfolio.

No definition available.

Name:	aumn_NumberOfAdditionalSelectedPropertiesAdvancedInPortfolio
Namespace Prefix:	aumn_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481687/323-10-50-3

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 730
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483041/730-20-50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 730
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483041/730-20-50-1

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=aumn_RodeoPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=aumn_VelardenaPropertiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=aumn_ElQuevarProjectMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: