XML 66 R43.htm IDEA: XBRL DOCUMENT v3.25.3

Reclamation and Remediation (Tables)

9 Months Ended

Sep. 30, 2025

Reclamation and Remediation

Schedule of changes in reclamation and remediation obligations

​

​	​	​	​	​	​	​
​	​	2025		​	2024
​	​	(in thousands)
Reclamation liabilities – balance at beginning of period	​	$	1,839	​	$	2,233
Foreign currency exchange loss (gain)	​	​	213	​	​	(394)
Reclamation liabilities – balance at end of period	​	​	2,052	​	​	1,839
​	​	​	​	​	​	​
Asset retirement obligation – balance at beginning of period	​	​	8,838	​	​	9,562
Changes in estimate (1)	​	​	-	​	​	512
Liability for Aquila drillhole capping	​	​	-	​	​	(329)
Accretion	​	​	565	​	​	793
Foreign currency exchange loss (gain)	​	​	1,047	​	​	(1,700)
Asset retirement obligation – balance at end of period	​	​	10,450	​	​	8,838
Total period end balance	​	$	12,502	​	$	10,677

(1) In 2024, the Company updated its closure plan study, which resulted in a $0.5 million increase in the estimated liability and ARO asset.

Schedule of reclamation and remediation obligations

​

​	​	​	​	​	​	​
​		As of		​	As of
​	​	September 30,		​	December 31,
​	​	2025			2024
​	​	(in thousands)
Current reclamation and remediation liabilities (1)	​	$	8	​	$	8
Non-current reclamation and remediation liabilities	​	​	12,494	​	​	10,669
Total	​	$	12,502	​	$	10,677

​

(1) The current portion of reclamation and remediation liabilities related to drill hole capping in Aquila, Michigan, are included in Accrued expenses and other current liabilities. Please see Note 11— Accrued Expenses and Other Liabilities in Item 1—Condensed Consolidated Interim Financial Statements and Notes (unaudited) for additional information.

X

- Definition

Tabular disclosure of the carrying amount of a liability for reclamation and remediation obligations.

+ References

No definition available.

+ Details

Name:	goro_ScheduleOfReclamationAndRemediationObligationsTableTextBlock
Namespace Prefix:	goro_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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

X

- Definition

Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 410
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481850/410-20-50-1

+ Details

Name:	us-gaap_ScheduleOfChangeInAssetRetirementObligationTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration