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v3.25.2

Accounts Payable and Accrued Liabilities including Related Parties (Details Narrative) - USD ($) | Jun. 30, 2025 | Mar. 25, 2025 | Dec. 31, 2024
--- | --- | --- | ---
Guaranteed debt percent |  | 3.00% |
Chief Executive Officer [Member] |  |  |
Accrued guarantee fee | $ 212,247 |  |

X
- Definition Accrued guarantee fee. + References No definition available. + Details
Name: | NXXT_AccruedGuaranteeFee
Namespace Prefix: | NXXT_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Guaranteed debt percent. + References No definition available. + Details
Name: | NXXT_GuaranteedDebtPercent
Namespace Prefix: | NXXT_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | srt_TitleOfIndividualAxis=srt_ChiefExecutiveOfficerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |