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

The percentage multiplied with the numerator before deduction of payments made for warrants exercise, for determination of the number of shares issuable upon exercise of warrants as of the reporting date.

No definition available.

Name:	nehc_ClassOfWarrantOrRightDeterminationOfNumberOfSharesIssuableNumeratorMultiplicationFactor
Namespace Prefix:	nehc_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

The number of warrants or rights that are issuable by the entity upon exercise of such instruments as of the reporting date.

No definition available.

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

The number of tranches of warrants in which the shares of the entity can be purchased as of the reporting date.

No definition available.

Name:	nehc_ClassOfWarrantOrRightNumberOfTranchesToPurchaseShares
Namespace Prefix:	nehc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

The fair value of shares issued or sold by the entity as per the stock transaction during the period.

No definition available.

Name:	nehc_SaleOfStockFairValueOfSharesIssuedInTransaction
Namespace Prefix:	nehc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Exercise price per share or per unit of warrants or rights outstanding.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

Name:	us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

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.

No definition available.

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

Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

No definition available.

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

Number of warrants or rights outstanding.

No definition available.

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

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

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

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

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

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

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