Depletion Capitalized Into Inventory

No definition available.

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

- Definition

Mineral Properties [Line Items]

+ References

No definition available.

+ Details

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

- Definition

Mineral Rights And Properties Inventory Capitalized Costs

+ References

No definition available.

+ Details

Name:	encr_MineralRightsAndPropertiesInventoryCapitalizedCosts
Namespace Prefix:	encr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Mineral Rights, Annual Maintenance Payments

+ References

No definition available.

+ Details

Name:	encr_MineralRightsAnnualMaintenancePayments
Namespace Prefix:	encr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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

- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

Name:	us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash inflow from the additional capital contribution to the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 14
-Subparagraph (a)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-14

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfCommonStock
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-SubTopic 10
-Topic 505
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-2

+ Details

Name:	us-gaap_SharesIssued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_IncomeStatementLocationAxis=encr_DistributionsToNoncontrollingInterestMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=encr_AltaMesaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=encr_VerderaEnergyCorpMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=encr_AltaMesaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Mineral Rights and Properties - Narrative (Details) $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Apr. 30, 2025 CAD ($) shares	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)	Feb. 29, 2024	Feb. 26, 2024	Dec. 05, 2023
Mineral Properties [Line Items]
Payments required to maintain mineral rights		$ 1,961,000		$ 1,961,000
Depletion		2,795,000	$ 0	4,572,000	$ 0
Capitalized costs		3,098,000		3,098,000
Mineral rights and properties, net		267,350,000		267,350,000		$ 271,922,000
Proceeds from issuance of common stock				0	$ 2,008,000
Distributions to NCI
Mineral Properties [Line Items]
Depletion				787,000
Alta Mesa
Mineral Properties [Line Items]
Ownership interest in subsidiary as a result of transaction (as a percent)							70.00%	70.00%	70.00%
Noncontrolling ownership percentage							30.00%
Verdera Energy Corp
Mineral Properties [Line Items]
Preferred shares (in shares) \| shares	50,000,000
Verdera Energy Corp \| Minimum
Mineral Properties [Line Items]
Proceeds from issuance of common stock	$ 20
Alta Mesa
Mineral Properties [Line Items]
Mineral rights and properties, net		$ 113,866,000		$ 113,866,000		$ 118,438,000