The number of shares issued on conversion of shares under business combination.

No definition available.

Name:	nehc_BusinessAcquisitionNumberOfSharesIssuedOnConversionPerShare
Namespace Prefix:	nehc_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of shares were tendered for redemption.

+ References

No definition available.

+ Details

Name:	nehc_CommonStockRightToRedeemSharesNumberOfShares
Namespace Prefix:	nehc_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Redemption amount.

+ References

No definition available.

+ Details

Name:	nehc_RedemptionAmount
Namespace Prefix:	nehc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Number of shares of equity interests issued or issuable to acquire entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 805
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479581/805-30-50-1

+ Details

Name:	us-gaap_BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479907/805-20-50-5

+ Details

Name:	us-gaap_BusinessAcquisitionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of warrants or rights outstanding.

+ References

No definition available.

+ Details

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

- Definition

Face amount or stated value per share of common stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	dei_LegalEntityAxis=nehc_RothChAcquisitionCoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=nehc_PublicWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=nehc_PrivateWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=nehc_RothChAcquisitionVCoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

RECAPITALIZATION (Details) - USD ($)	Dec. 06, 2024	Mar. 31, 2025	Dec. 31, 2024	Dec. 05, 2024	Dec. 01, 2023
RECAPITALIZATION
Common stock, par value (in dollars per share)		$ 0.0001	$ 0.0001
Roth Ch Acquisition Co
RECAPITALIZATION
Exercised right to redeem				11,162,973	927,715
Redemption amount				$ 117,044,333
Public Warrants
RECAPITALIZATION
Warrants outstanding		5,750,000	5,750,000
Public Warrants \| Roth Ch Acquisition Co
RECAPITALIZATION
Warrants outstanding	5,750,000
Private Warrants
RECAPITALIZATION
Warrants outstanding		230,750	230,750
Private Warrants \| Roth Ch Acquisition Co
RECAPITALIZATION
Warrants outstanding	230,750
Roth CH Acquisition V Co
RECAPITALIZATION
Consideration paid in shares	8,916,625
Common stock, par value (in dollars per share)	$ 0.0001
Shares issued on conversion, per share	1