Asset Sale Amount Past Due in Delinquency.

No definition available.

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

- Definition

Represents the percentage of equity interest sold.

+ References

No definition available.

+ Details

Name:	aumn_DiscontinuedOperationsPercentageOfEquityInterestSold
Namespace Prefix:	aumn_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the percentage of equity interest to be sold.

+ References

No definition available.

+ Details

Name:	aumn_DiscontinuedOperationsPercentageOfEquityInterestToBeSold
Namespace Prefix:	aumn_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the percentage of breakup fee receivable on termination of purchase agreement.

+ References

No definition available.

+ Details

Name:	aumn_DisposalGroupIncludingDiscontinuedOperationBreakupFee
Namespace Prefix:	aumn_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of consideration received for the disposal of assets and liabilities, including discontinued operation as non-refundable deposit.

+ References

No definition available.

+ Details

Name:	aumn_DisposalGroupIncludingDiscontinuedOperationConsiderationNonRefundableDeposit
Namespace Prefix:	aumn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount classified as consideration receivable attributable to disposal group held for sale or disposed of.

+ References

No definition available.

+ Details

Name:	aumn_DisposalGroupIncludingDiscontinuedOperationConsiderationReceivable
Namespace Prefix:	aumn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the number of total first payment.

+ References

No definition available.

+ Details

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

- Definition

Represents the number of days to carry out due diligence.

+ References

No definition available.

+ Details

Name:	aumn_NumberOfDaysToCarryOutDueDiligence
Namespace Prefix:	aumn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

+ References

No definition available.

+ Details

Name:	us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-12

+ Details

Name:	us-gaap_ProceedsFromDivestitureOfBusinesses
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 12
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-12

+ Details

Name:	us-gaap_ProceedsFromSaleOfProductiveAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481674/830-30-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483399/855-10-50-2

+ Details

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

- Details

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

- Details

Name:	us-gaap_DisposalGroupClassificationAxis=us-gaap_DiscontinuedOperationsHeldforsaleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=aumn_OxidePlantAndWaterWellMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_DisposalGroupClassificationAxis=us-gaap_DiscontinuedOperationsDisposedOfBySaleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=aumn_YoquivoProjectMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DisposalGroupClassificationAxis=us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Subsequent Events (Details)					1 Months Ended	2 Months Ended	6 Months Ended	9 Months Ended
Subsequent Events (Details)	Nov. 21, 2024 USD ($) payment	Nov. 15, 2024 USD ($)	Oct. 25, 2024 USD ($)	Oct. 24, 2024 USD ($)	Nov. 15, 2024 USD ($)	Nov. 15, 2024 USD ($)	Jun. 30, 2024 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Nov. 01, 2024 USD ($)	Sep. 27, 2024 USD ($)	Sep. 03, 2024 USD ($)	Aug. 30, 2024 USD ($)
Subsequent Events
Proceeds from sale of assets								$ 139,000	$ 44,000
Velardena Properties
Subsequent Events
Proceeds from sale of assets							$ 373,000
Velardena Properties \| Held for sale \| Oxide Plant and Water Well
Subsequent Events
Consideration still owed								2,000,000.0
Total consideration								3,000,000.0
Silex Argentina Transaction \| Sale, discontinued operations
Subsequent Events
Percentage of AVM shall purchase													100.00%
Total consideration											$ 500,000		$ 3,500,000
Non-refundable cash payment								$ 500,000			$ 500,000	$ 500,000
Subsequent Events \| Velardena Properties
Subsequent Events
Proceeds from sale of assets		$ 300,000			$ 300,000
Asset sale amount past due in delinquency						$ 1,300,000
Subsequent Events \| Velardena Properties \| Sale, discontinued operations \| Oxide Plant and Water Well
Subsequent Events
Consideration still owed		1,700,000			1,700,000	1,700,000
Total consideration		$ 3,000,000.0			$ 3,000,000.0	$ 3,000,000.0
Subsequent Events \| Silex Argentina Transaction \| Sale, discontinued operations
Subsequent Events
Percentage of equity interest sold				100.00%
Acquisition agreement cash				$ 2,500,000
Total consideration				$ 2,500,000
Subsequent Events \| Minera De Cordilleras S De Rl De Cv \| Sale, discontinued operations \| Yoquivo Project
Subsequent Events
Percentage of AVM shall purchase			100.00%
Subsequent Events \| Minera De Cordilleras S De Rl De Cv \| Sale, not discontinued operations \| Yoquivo Project
Subsequent Events
Proceeds from sale of assets	$ 295,000
Total consideration	$ 275,000		$ 570,000							$ 275,000
Number of first payments \| payment	2
Non-refundable cash payment			$ 20,000
Number of days to carry out due diligence			7 days
Breakup fee percentage			20.00%