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Commitments and Contingencies - Contingent Consideration (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2025	Dec. 31, 2024
Commitments and Contingencies
Beginning Balance of contingent consideration: Non-current contingent consideration	$ 3,389	$ 3,404
Change in value of contingent consideration - Non-current	112	(15)
Ending Balance of contingent consideration: Non-current contingent consideration	$ 3,501	$ 3,389

X

- Definition

Increase (decrease) in fair value of amount of non current liability recognized from contingent consideration in asset acquisition.

+ References

No definition available.

+ Details

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Namespace Prefix:	goro_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of liability recognized from contingent consideration in asset acquisition, classified as noncurrent.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 15
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480123/805-50-15-3

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

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