Carrying amount of asset

No definition available.

Name:	NXXT_CarryingAmountOfAsset
Namespace Prefix:	NXXT_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Cash reciepts.

+ References

No definition available.

+ Details

Name:	NXXT_CashReciepts
Namespace Prefix:	NXXT_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Deposit on future asset purchase noncurrent.

+ References

No definition available.

+ Details

Name:	NXXT_DepositOnFutureAssetPurchaseNonCurrent
Namespace Prefix:	NXXT_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Number of vehicles.

+ References

No definition available.

+ Details

Name:	NXXT_NumberOfVehicles
Namespace Prefix:	NXXT_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

reclassified vehicles.

+ References

No definition available.

+ Details

Name:	NXXT_Reclassifiedvehicles
Namespace Prefix:	NXXT_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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+ Details

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

- Definition

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of general and administrative expense classified as other.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
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+ Details

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

- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
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-Paragraph 14
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-14

+ Details

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

- Definition

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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 842
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+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=NXXT_AssetPurchaseAgreementMember
Namespace Prefix:
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Balance Type:
Period Type:

Property and Equipment (Details Narrative)		6 Months Ended
Property and Equipment (Details Narrative)	May 29, 2025 Integer	Jun. 30, 2025 USD ($) Integer	Jun. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)
Property, Plant and Equipment [Line Items]
Deposit on future asset purchase			$ 2,035,283	$ 2,035,283
Reclassified vehicles		1,229,000
Depreciation and amortization		$ 1,289,088	$ 773,821
[custom:NumberOfVehicles] \| Integer	34
Trucks [Member]
Property, Plant and Equipment [Line Items]
[custom:NumberOfVehicles] \| Integer		34
[custom:CarryingAmountOfAsset]		$ 1,199,620
Proceeds from Sale of Property, Plant, and Equipment		899,640
Proceeds from Issuance of Debt		250,000
Other General and Administrative Expense		117,790
[custom:CashReciepts-0]		531,850
Gain (Loss) on Disposition of Property Plant Equipment		299,980
Asset Purchase Agreement [Member]
Property, Plant and Equipment [Line Items]
Deposit on future asset purchase		$ 2,035,283