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Gold and Silver Stream Agreements - Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Deferred revenue	$ 43,466	$ 42,560
Gold Streaming Agreement
Deferred revenue	20,881	20,364
Silver Streaming Agreement
Deferred revenue	$ 22,585	$ 22,196

X

- Definition

Amount of deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable, classified as noncurrent.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(26)(c))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

X

- Details

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

X

- Details

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