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Commitment and Contingencies - Narrative (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
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Commitments and Contingencies Disclosure [Abstract] |  |
Annual renewal costs expected for year ended December 31, 2025 | $ 1,505 |
Performance bonds | 7,751 | $ 7,680
Undiscounted cash flows | $ 23,529 | $ 17,130

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- Definition Asset Retirement Obligation, Performance Bonds, Restoration and Reclamation Obligations + References No definition available. + Details
Name: | encr_AssetRetirementObligationPerformanceBondsRestorationAndReclamationObligations
Namespace Prefix: | encr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Asset Retirement Obligation, Undiscounted Cash Flows + References No definition available. + Details
Name: | encr_AssetRetirementObligationUndiscountedCashFlows
Namespace Prefix: | encr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Lessee, Mineral Right Lease, Renewal Costs Expected To Be Paid, Year One + References No definition available. + Details
Name: | encr_LesseeMineralRightLeaseRenewalCostsExpectedToBePaidYearOne
Namespace Prefix: | encr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration