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Mineral Rights and Properties - Activity of Mineral Rights and Properties (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Mineral Rights and Properties [Roll Forward]
Beginning balance	$ 274,490	$ 154,765
Additions		122,894
Divestiture		(3,169)
Depletion	(2,568)
Ending balance	$ 271,922	$ 274,490

X

- Definition

Mineral Properties, Additions

+ References

No definition available.

+ Details

Name:	encr_MineralPropertiesAdditions
Namespace Prefix:	encr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Mineral Properties, Depletion

+ References

No definition available.

+ Details

Name:	encr_MineralPropertiesDepletion
Namespace Prefix:	encr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Mineral Properties, Divestiture

+ References

No definition available.

+ Details

Name:	encr_MineralPropertiesDivestiture
Namespace Prefix:	encr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Mineral Rights and Properties

+ References

No definition available.

+ Details

Name:	encr_MineralRightsAndPropertiesRollForward
Namespace Prefix:	encr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- 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