<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.26.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>199</ContextCount>
  <ElementCount>254</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>61</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>8</UnitCount>
  <MyReports>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>995300 - Document - Cover</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/Cover</Role>
      <ShortName>Cover</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>995301 - Statement - Condensed Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/CondensedConsolidatedBalanceSheets</Role>
      <ShortName>Condensed Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>995302 - Statement - Condensed Consolidated Balance Sheets (Parentheticals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/CondensedConsolidatedBalanceSheetsParentheticals</Role>
      <ShortName>Condensed Consolidated Balance Sheets (Parentheticals)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>995303 - Statement - Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/CondensedConsolidatedStatementsofOperationsandComprehensiveIncomeUnaudited</Role>
      <ShortName>Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>995304 - Statement - Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) (Parentheticals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/CondensedConsolidatedStatementsofOperationsandComprehensiveIncomeUnauditedParentheticals</Role>
      <ShortName>Condensed Consolidated Statements of Operations and Comprehensive Income (Unaudited) (Parentheticals)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>995305 - Statement - Condensed Consolidated Statements of Changes in Stockholders’ Equity (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/CondensedConsolidatedStatementsofChangesinStockholdersEquityUnaudited</Role>
      <ShortName>Condensed Consolidated Statements of Changes in Stockholders’ Equity (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>995306 - Statement - Condensed Consolidated Statements of Changes in Stockholders’ Equity (Unaudited) (Parentheticals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/CondensedConsolidatedStatementsofChangesinStockholdersEquityUnauditedParentheticals</Role>
      <ShortName>Condensed Consolidated Statements of Changes in Stockholders’ Equity (Unaudited) (Parentheticals)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>995307 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/CondensedConsolidatedStatementsofCashFlowsUnaudited</Role>
      <ShortName>Condensed Consolidated Statements of Cash Flows (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>995308 - Disclosure - Nature of Business</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/NatureofBusiness</Role>
      <ShortName>Nature of Business</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>995309 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/SummaryofSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>995310 - Disclosure - Cash and Cash Equivalents</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/CashandCashEquivalents</Role>
      <ShortName>Cash and Cash Equivalents</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>995311 - Disclosure - Digital Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/DigitalAssets</Role>
      <ShortName>Digital Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>995312 - Disclosure - Accounts Receivable, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/AccountsReceivableNet</Role>
      <ShortName>Accounts Receivable, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>995313 - Disclosure - Prepaid Expenses</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/PrepaidExpenses</Role>
      <ShortName>Prepaid Expenses</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>995314 - Disclosure - Investment in Associate Company</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/InvestmentinAssociateCompany</Role>
      <ShortName>Investment in Associate Company</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>995315 - Disclosure - Amount Due to Related Parties</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/AmountDuetoRelatedParties</Role>
      <ShortName>Amount Due to Related Parties</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>995316 - Disclosure - Accrued Expense and Other Payables</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/AccruedExpenseandOtherPayables</Role>
      <ShortName>Accrued Expense and Other Payables</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>995317 - Disclosure - Shareholders’ Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/ShareholdersEquity</Role>
      <ShortName>Shareholders’ Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>995318 - Disclosure - Share-Based Compensation Expense</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/ShareBasedCompensationExpense</Role>
      <ShortName>Share-Based Compensation Expense</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>995319 - Disclosure - Income Tax Expenses</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/IncomeTaxExpenses</Role>
      <ShortName>Income Tax Expenses</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>995320 - Disclosure - Basic and Diluted Net Income Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/BasicandDilutedNetIncomePerShare</Role>
      <ShortName>Basic and Diluted Net Income Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>995321 - Disclosure - Segment Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/SegmentInformation</Role>
      <ShortName>Segment Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>995322 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/CommitmentsandContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>995323 - Disclosure - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/SubsequentEvents</Role>
      <ShortName>Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>995410 - Disclosure - Pay vs Performance Disclosure</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/PvpDisclosure</Role>
      <ShortName>Pay vs Performance Disclosure</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>995445 - Disclosure - Insider Trading Arrangements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements</Role>
      <ShortName>Insider Trading Arrangements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>996324 - Disclosure - Accounting Policies, by Policy (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/AccountingPoliciesbyPolicyPolicies</Role>
      <ShortName>Accounting Policies, by Policy (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://wetradegroup.net/20260630/role/SummaryofSignificantAccountingPolicies</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>996325 - Disclosure - Nature of Business (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/NatureofBusinessTables</Role>
      <ShortName>Nature of Business (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://wetradegroup.net/20260630/role/NatureofBusiness</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>996326 - Disclosure - Summary of Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/SummaryofSignificantAccountingPoliciesTables</Role>
      <ShortName>Summary of Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://wetradegroup.net/20260630/role/SummaryofSignificantAccountingPolicies</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>996327 - Disclosure - Cash and Cash Equivalents (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/CashandCashEquivalentsTables</Role>
      <ShortName>Cash and Cash Equivalents (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://wetradegroup.net/20260630/role/CashandCashEquivalents</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>996328 - Disclosure - Digital Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/DigitalAssetsTables</Role>
      <ShortName>Digital Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://wetradegroup.net/20260630/role/DigitalAssets</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>996329 - Disclosure - Accounts Receivable, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/AccountsReceivableNetTables</Role>
      <ShortName>Accounts Receivable, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://wetradegroup.net/20260630/role/AccountsReceivableNet</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>996330 - Disclosure - Investment in Associate Company (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/InvestmentinAssociateCompanyTables</Role>
      <ShortName>Investment in Associate Company (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://wetradegroup.net/20260630/role/InvestmentinAssociateCompany</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>996331 - Disclosure - Amount Due to Related Parties (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/AmountDuetoRelatedPartiesTables</Role>
      <ShortName>Amount Due to Related Parties (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://wetradegroup.net/20260630/role/AmountDuetoRelatedParties</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>996332 - Disclosure - Accrued Expense and Other Payables (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/AccruedExpenseandOtherPayablesTables</Role>
      <ShortName>Accrued Expense and Other Payables (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://wetradegroup.net/20260630/role/AccruedExpenseandOtherPayables</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>996333 - Disclosure - Share-Based Compensation Expense (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/ShareBasedCompensationExpenseTables</Role>
      <ShortName>Share-Based Compensation Expense (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://wetradegroup.net/20260630/role/ShareBasedCompensationExpense</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>996334 - Disclosure - Income Tax Expenses (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/IncomeTaxExpensesTables</Role>
      <ShortName>Income Tax Expenses (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://wetradegroup.net/20260630/role/IncomeTaxExpenses</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>996335 - Disclosure - Basic and Diluted Net Income Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/BasicandDilutedNetIncomePerShareTables</Role>
      <ShortName>Basic and Diluted Net Income Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://wetradegroup.net/20260630/role/BasicandDilutedNetIncomePerShare</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>996336 - Disclosure - Segment Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/SegmentInformationTables</Role>
      <ShortName>Segment Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://wetradegroup.net/20260630/role/SegmentInformation</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>996337 - Disclosure - Nature of Business (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/NatureofBusinessDetails</Role>
      <ShortName>Nature of Business (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://wetradegroup.net/20260630/role/NatureofBusinessTables</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>996338 - Disclosure - Nature of Business - Schedule of Fair Value Changes in Digital Asset (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/NatureofBusinessScheduleofFairValueChangesinDigitalAssetDetails</Role>
      <ShortName>Nature of Business - Schedule of Fair Value Changes in Digital Asset (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>996339 - Disclosure - Summary of Significant Accounting Policies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/SummaryofSignificantAccountingPoliciesDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://wetradegroup.net/20260630/role/SummaryofSignificantAccountingPoliciesTables</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>996340 - Disclosure - Summary of Significant Accounting Policies - Schedule of Company’s Digital Assets Holdings (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/SummaryofSignificantAccountingPoliciesScheduleofCompanysDigitalAssetsHoldingsDetails</Role>
      <ShortName>Summary of Significant Accounting Policies - Schedule of Company’s Digital Assets Holdings (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>996341 - Disclosure - Cash and Cash Equivalents (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/CashandCashEquivalentsDetails</Role>
      <ShortName>Cash and Cash Equivalents (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://wetradegroup.net/20260630/role/CashandCashEquivalentsTables</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>996342 - Disclosure - Cash and Cash Equivalents - Schedule of Cash Held in Bank (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/CashandCashEquivalentsScheduleofCashHeldinBankDetails</Role>
      <ShortName>Cash and Cash Equivalents - Schedule of Cash Held in Bank (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>996343 - Disclosure - Digital Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/DigitalAssetsDetails</Role>
      <ShortName>Digital Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://wetradegroup.net/20260630/role/DigitalAssetsTables</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>996344 - Disclosure - Digital Assets - Schedule of Digital Assets Holdings (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/DigitalAssetsScheduleofDigitalAssetsHoldingsDetails</Role>
      <ShortName>Digital Assets - Schedule of Digital Assets Holdings (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>996345 - Disclosure - Accounts Receivable, Net - Schedule of Accounts Receivable (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/AccountsReceivableNetScheduleofAccountsReceivableDetails</Role>
      <ShortName>Accounts Receivable, Net - Schedule of Accounts Receivable (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>996346 - Disclosure - Prepaid Expenses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/PrepaidExpensesDetails</Role>
      <ShortName>Prepaid Expenses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://wetradegroup.net/20260630/role/PrepaidExpenses</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>996347 - Disclosure - Investment in Associate Company - Schedule of Investment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/InvestmentinAssociateCompanyScheduleofInvestmentDetails</Role>
      <ShortName>Investment in Associate Company - Schedule of Investment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>996348 - Disclosure - Amount Due to Related Parties (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/AmountDuetoRelatedPartiesDetails</Role>
      <ShortName>Amount Due to Related Parties (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://wetradegroup.net/20260630/role/AmountDuetoRelatedPartiesTables</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>996349 - Disclosure - Amount Due to Related Parties - Schedule of Nature of Relationships with Related Parties (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/AmountDuetoRelatedPartiesScheduleofNatureofRelationshipswithRelatedPartiesDetails</Role>
      <ShortName>Amount Due to Related Parties - Schedule of Nature of Relationships with Related Parties (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>996350 - Disclosure - Accrued Expense and Other Payables - Schedule of Accrued Expenses and Other Payables (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/AccruedExpenseandOtherPayablesScheduleofAccruedExpensesandOtherPayablesDetails</Role>
      <ShortName>Accrued Expense and Other Payables - Schedule of Accrued Expenses and Other Payables (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>996351 - Disclosure - Shareholders’ Equity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/ShareholdersEquityDetails</Role>
      <ShortName>Shareholders’ Equity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://wetradegroup.net/20260630/role/ShareholdersEquity</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>996352 - Disclosure - Share-Based Compensation Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/ShareBasedCompensationExpenseDetails</Role>
      <ShortName>Share-Based Compensation Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://wetradegroup.net/20260630/role/ShareBasedCompensationExpenseTables</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>996353 - Disclosure - Share-Based Compensation Expense - Schedule of Share-Based Compensation Expenses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/ShareBasedCompensationExpenseScheduleofShareBasedCompensationExpensesDetails</Role>
      <ShortName>Share-Based Compensation Expense - Schedule of Share-Based Compensation Expenses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>996354 - Disclosure - Share-Based Compensation Expense - Schedule of Service-Based Share Awards (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/ShareBasedCompensationExpenseScheduleofServiceBasedShareAwardsDetails</Role>
      <ShortName>Share-Based Compensation Expense - Schedule of Service-Based Share Awards (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>996355 - Disclosure - Income Tax Expenses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/IncomeTaxExpensesDetails</Role>
      <ShortName>Income Tax Expenses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://wetradegroup.net/20260630/role/IncomeTaxExpensesTables</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>996356 - Disclosure - Income Tax Expenses - Schedule of Current and Deferred Portions of Income Tax Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/IncomeTaxExpensesScheduleofCurrentandDeferredPortionsofIncomeTaxExpenseDetails</Role>
      <ShortName>Income Tax Expenses - Schedule of Current and Deferred Portions of Income Tax Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>996357 - Disclosure - Income Tax Expenses - Schedule of (Loss) Income before Income Tax (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/IncomeTaxExpensesScheduleofLossIncomebeforeIncomeTaxDetails</Role>
      <ShortName>Income Tax Expenses - Schedule of (Loss) Income before Income Tax (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>996358 - Disclosure - Income Tax Expenses - Schedule of Components of Deferred Tax Assets and Deferred Tax Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/IncomeTaxExpensesScheduleofComponentsofDeferredTaxAssetsandDeferredTaxLiabilitiesDetails</Role>
      <ShortName>Income Tax Expenses - Schedule of Components of Deferred Tax Assets and Deferred Tax Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>996359 - Disclosure - Basic and Diluted Net Income Per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/BasicandDilutedNetIncomePerShareDetails</Role>
      <ShortName>Basic and Diluted Net Income Per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://wetradegroup.net/20260630/role/BasicandDilutedNetIncomePerShareTables</ParentRole>
      <Position>62</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>996360 - Disclosure - Basic and Diluted Net Income Per Share - Schedule of Basic Earnings Per Share and Diluted Earnings Per Share (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/BasicandDilutedNetIncomePerShareScheduleofBasicEarningsPerShareandDilutedEarningsPerShareDetails</Role>
      <ShortName>Basic and Diluted Net Income Per Share - Schedule of Basic Earnings Per Share and Diluted Earnings Per Share (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>996361 - Disclosure - Segment Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/SegmentInformationDetails</Role>
      <ShortName>Segment Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://wetradegroup.net/20260630/role/SegmentInformationTables</ParentRole>
      <Position>64</Position>
    </Report>
    <Report instance="ea0298994-10q_next.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>996362 - Disclosure - Segment Information - Schedule of Segment’s Measure of Profit or Loss (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://wetradegroup.net/20260630/role/SegmentInformationScheduleofSegmentsMeasureofProfitorLossDetails</Role>
      <ShortName>Segment Information - Schedule of Segment’s Measure of Profit or Loss (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File doctype="10-Q" isDefinitelyFs="true" isUsgaap="true" original="ea0298994-10q_next.htm">ea0298994-10q_next.htm</File>
    <File>nxtt-20260630.xsd</File>
    <File>nxtt-20260630_cal.xml</File>
    <File>nxtt-20260630_def.xml</File>
    <File>nxtt-20260630_lab.xml</File>
    <File>nxtt-20260630_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="628">http://fasb.org/us-gaap/2026</BaseTaxonomy>
    <BaseTaxonomy items="33">http://xbrl.sec.gov/dei/2026</BaseTaxonomy>
    <BaseTaxonomy items="4">http://xbrl.sec.gov/ecd/2026</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
