XML 49 R32.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Stockholders' Equity - Additional Information (Details) - USD ($) |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 28, 2016 | Feb. 28, 2018 | Jan. 31, 2018 | Mar. 31, 2018 | Dec. 31, 2016 | Dec. 31, 2017 | Apr. 30, 2017
Class of Stock [Line Items] |  |  |  |  |  |  |
Make-whole liability |  |  |  | $ 216,147 |  | $ 0 |
Leviston |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Number of shares issued (in shares) |  | 615,605 |  |  |  |  |
Value of shares issued |  | $ 20,000 |  |  |  |  |
ATM Agreement |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Number of shares issued (in shares) |  |  |  | 4,679,904 | 9,464,764 |  |
ATM Agreement | International Assets Advisory LLC |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Aggregate offering price, up to | $ 5,000,000 |  |  |  |  |  |
Commission paid (as a percent) | 2.50% |  |  |  |  |  |
ATM Agreement | Leviston |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Aggregate offering price, up to |  |  |  |  |  |  | $ 7,250,000.00
Pelen LLC |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Membership interest subsequent to sale of shares |  |  | 25.00% |  |  |  |
Restricted Stock | Member Of Pelen, LLC [Member] |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |
Common stock, shares issued (in shares) |  |  | 1,475,410 |  |  |  |
Share-based compensation, grant date fair value |  |  | $ 585,000 |  |  |  |
Required proceeds to be received by member to acquire membership interest |  |  | $ 585,000 |  |  |  |

X
- Definition Accrued Make-Whole Membership Interest Expense, Current + References No definition available. + Details
Name: | lode_AccruedMakeWholeMembershipInterestExpenseCurrent
Namespace Prefix: | lode_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Common Stock, Aggregate Offering Price + References No definition available. + Details
Name: | lode_CommonStockAggregateOfferingPrice
Namespace Prefix: | lode_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Common Stock, Commission Paid, Percentage + References No definition available. + Details
Name: | lode_CommonStockCommissionPaidPercentage
Namespace Prefix: | lode_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Required Proceeds From Sale Of Stock To Acquire Membership Interest + References No definition available. + Details
Name: | lode_RequiredProceedsFromSaleOfStockToAcquireMembershipInterest
Namespace Prefix: | lode_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Share Based Compensation Arrangement By Share Based Payment Award, Equity Instruments Other Than Options, Grants In Period Grant Date Fair Value. + References No definition available. + Details
Name: | lode_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodGrantDateFairValue
Namespace Prefix: | lode_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Definition The number of units or percentage investment held by one or more members or limited partners of the LLC or LP. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055 + Details
Name: | us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPMembersOrLimitedPartnersOwnershipInterest
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of new stock issued during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_StockIssuedDuringPeriodValueNewIssues
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_CounterpartyNameAxis=lode_LevistonMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=lode_AtthemarketOfferingProgramATMAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CounterpartyNameAxis=lode_InternationalAssetsAdvisoryLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | lode_OwnershipAxis=lode_PelenLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CounterpartyNameAxis=lode_MemberOfPelenLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |