SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Accounts receivable, net (Details) - USD ($)	Mar. 31, 2025	Dec. 31, 2024	Jan. 01, 2024
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Oil, natural gas and NGL sales	$ 281,299	$ 108,091
Joint interest accounts receivable	773,894	624,577
Other accounts receivable	116,980	118,636
Total Accounts receivable, net	$ 1,172,173	$ 851,304	$ 692,351

Amount due from customers or clients for goods or services that have been delivered or sold in normal course of business, classified as current.

No definition available.

+ Details

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Namespace Prefix:	nehc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

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

- Definition

Amount, after allowance, receivable from customers, clients, or other third-parties, and receivables classified as other due within one year or the normal operating cycle, if longer.

+ References

No definition available.

+ Details

Name:	us-gaap_AccountsAndOtherReceivablesNetCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of receivable from nonoperator partner in joint interest operation in oil- and gas-producing activities, classified as current.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 932
-SubTopic 323
-Name Accounting Standards Codification
-Section 25
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477472/932-323-25-1

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant