Name:	hymc_RelatedPartyTransactionMinimumPercentageOfCommonStockHeldByRelatedPartyRightToNominateOneDirector
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The number of financial institutions held the percentage of stock to be considered a related party.

No definition available.

Name:	hymc_RelatedPartyTransactionNumberOfFinancialInstitutionsConsideredRelatedParty
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Data Type:	xbrli:integerItemType
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The number of financial institutions in which debt has been issued.

No definition available.

Name:	hymc_RelatedPartyTransactionNumberOfFinancialInstitutionsDebtIssued
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Data Type:	xbrli:integerItemType
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Face (par) amount of debt instrument at time of issuance.

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Carrying amount as of the balance sheet date of obligations due all related parties. For classified balance sheets, represents the current portion of such liabilities (due within one year or within the normal operating cycle if longer).

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Amount of interest expense incurred on a debt or other obligation to related party.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of transactions with related party during the financial reporting period.

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Name:	us-gaap_RelatedPartyTransactionAmountsOfTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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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.

No definition available.