The amount of quarterly installments of second year anniversary consideration.

No definition available.

Name:	aumn_AmountOfQuarterlyInstallmentOfSecondYearAnniversaryConsideration
Namespace Prefix:	aumn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The carrying value of concessions allowed related to the Company's immaterial exploration project.

+ References

No definition available.

+ Details

Name:	aumn_ConcessionsAllowedCarryingValue
Namespace Prefix:	aumn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The minimum amount spend for work expenditure to withdraw the agreement.

+ References

No definition available.

+ Details

Name:	aumn_MinimumWorkExpendituresSpendToWithdrawAgreement
Namespace Prefix:	aumn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The number of quarterly installments of second year anniversary consideration.

+ References

No definition available.

+ Details

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

- Definition

The amount of second year anniversary consideration

+ References

No definition available.

+ Details

Name:	aumn_SecondYearAnniversaryConsideration
Namespace Prefix:	aumn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130531-203044

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130532-203044

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130549-203045

+ Details

Name:	us-gaap_ContractWithCustomerLiabilityCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

No definition available.

+ Details

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

- Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=aumn_SaleOfSantaMariaPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=aumn_FabledCopperCorp.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=aumn_BindingLetterOfIntentAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Property, Plant and Equipment - Disposals (Details)		3 Months Ended	12 Months Ended
Property, Plant and Equipment - Disposals (Details)	Dec. 19, 2022 USD ($) installment	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Property, plant and equipment
Contract with customer liability		$ 0	$ 0	$ 1,500,000
Minimum work expenditures spend to withdraw agreement				$ 1,000,000
Sale of Santa Maria Property
Property, plant and equipment
Carrying value of concessions allowed		$ 0	$ 0
Sale of Santa Maria Property \| Fabled Copper Corp. \| Binding Letter of Intent Agreement
Property, plant and equipment
Number of quarterly installments of second year anniversary \| installment	8
Amount of second year anniversary consideration	$ 250,000
Second year anniversary consideration	$ 2,000,000.0