XML 101 R66.htm IDEA: XBRL DOCUMENT
v3.22.4

Other Non-current Assets - Narrative (Details) $ / shares in Units, shares in Thousands, $ in Thousands, $ in Millions |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Sep. 22, 2022 CAD ($) shares | Dec. 31, 2022 CAD ($) $ / shares | Dec. 31, 2022 USD ($) | Dec. 28, 2022 shares | Sep. 22, 2022 USD ($) shares
Green Light Metals |  |  |  |  |
Other Non-current Assets |  |  |  |  |
Number of shares purchased or received |  |  |  | 12,250 |
Equity Investment |  | $ 4.9 | $ 3,600 |  |
Ownership percentage |  | 28.50% | 28.50% | 28.50% |
Maximum per share amount for additional shares being issued. | $ / shares |  | $ 0.40 |  |  |
Maritime Resources Corp |  |  |  |  |
Other Non-current Assets |  |  |  |  |
Investment amount | $ 2.4 |  |  |  | $ 1,700
Number of shares purchased or received | 47,000 |  |  |  | 47,000
Percentage of investment on issued and outstanding capital | 9.90% |  |  |  |
Equity Investment | $ |  |  | $ 1,559 |  |

X
- Definition Amount of investment in equity method investee. + References No definition available. + Details
Name: | goro_EquityMethodInvestmentInvestmentAmount
Namespace Prefix: | goro_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of shares purchased or received from equity method investment. + References No definition available. + Details
Name: | goro_EquityMethodInvestmentNumberOfSharesPurchased
Namespace Prefix: | goro_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of equity method investment of issued and outstanding capital of investee. + References No definition available. + Details
Name: | goro_EquityMethodInvestmentPercentageOfInvestmentOnIssuedAndOutstandingShares
Namespace Prefix: | goro_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum per share amount for additional shares being issued. + References No definition available. + Details
Name: | goro_ThresholdPriceForAdditionalSharesBeingIssued
Namespace Prefix: | goro_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- 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 -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
Name: | us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=109237563&loc=d3e33749-111570 Reference 2: 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(10)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8813-108599 + Details
Name: | us-gaap_EquityMethodInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=goro_GreenLightMetalsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=goro_MaritimeResourcesCorpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |