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Mineral Rights and Properties - Schedule of Activity of Mineral Rights and Properties (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Mineral Rights and Properties [Roll Forward] |  |  |  |
Beginning balance |  |  | $ 271,922,000 |
Depletion capitalized into inventory | $ (2,795,000) | $ 0 | (4,572,000) | $ 0
Ending balance | $ 267,350,000 |  | $ 267,350,000 |

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- Definition Depletion Capitalized Into Inventory + References No definition available. + Details
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Namespace Prefix: | encr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Mineral Rights and Properties + References No definition available. + Details
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Namespace Prefix: | encr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Mineral properties, net of adjustments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 360 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 + Details
Name: | us-gaap_MineralPropertiesNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant