Future Right Percentage Of Offerings

No definition available.

Name:	aumn_FutureRightPercentageOfOfferings
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Balance Type:	na
Period Type:	duration

- Definition

Offering Agreement Period Precluded From Selling Similar Equity

+ References

No definition available.

+ Details

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

- Definition

Represents the percentage of placement agent fee.

+ References

No definition available.

+ Details

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Namespace Prefix:	aumn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The exercisable period of warrant from the date of issuance.

+ References

No definition available.

+ Details

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

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(2))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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Balance Type:	na
Period Type:	instant

- 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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
-Paragraph 3
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+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow for cost incurred directly with the issuance of an equity security.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow from the additional capital contribution to the entity.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from issuance of rights to purchase common shares at predetermined price (usually issued together with corporate debt).

+ References

+ Details

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

- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

No definition available.

+ Details

Name:	us-gaap_SharePrice
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of new stock issued during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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+ Details

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Data Type:	xbrli:sharesItemType
Balance Type:	na
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

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
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- Details

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- Details

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- Details

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Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Thousands				3 Months Ended
	Apr. 20, 2020	Apr. 09, 2020	Jul. 17, 2019	Mar. 31, 2020	Mar. 31, 2019
Subsequent Event
Proceeds from Issuance of Common Stock				$ 439	$ 337
Private Placement \| Subsequent Event [Member]
Subsequent Event
Total cost of offering	$ 250
Placement agent fee (as a percent)	6.00%
Future Right Percentage Of Offerings	50.00%
Offering Agreement Period Precluded From Selling Similar Equity	90 days
Private Placement \| Subsequent Event [Member] \| Common Stock
Subsequent Event
Common stock issued (in shares)	15,000,000
Share Price	$ 0.20
Warrants to purchase common stock	11,250,000
Private Placement \| Subsequent Event [Member] \| Maximum
Subsequent Event
Warrants exercise period	5 years
Private Placement \| Subsequent Event [Member] \| Minimum
Subsequent Event
Warrants exercise period	6 months
El Quevar Project \| Barrick Earn-In Agreement [Member] \| Subsequent Event [Member]
Subsequent Event
Investment ownership percentage		70.00%
Common stock issued (in shares)		4,700,000
Share Price		$ 0.21
Proceeds from Issuance of Common Stock		$ 1,000
Warrants Series A and B [Member] \| Private Placement \| Subsequent Event [Member]
Subsequent Event
Share Price	$ 0.30
Aggregate gross proceeds of warrants	$ 3,000
Series A Warrants
Subsequent Event
Warrants exercise period			6 months
Series A Warrants \| Private Placement \| Subsequent Event [Member] \| Common Stock
Subsequent Event
Warrants to purchase common stock	7,500,000
Series B Warrants
Subsequent Event
Warrants exercise period			6 months
Series B Warrants \| Private Placement \| Subsequent Event [Member] \| Common Stock
Subsequent Event
Warrants to purchase common stock	3,750,000