<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.26.3</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>114</ContextCount>
  <ElementCount>232</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>27</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>6</UnitCount>
  <MyReports>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>000 - Document - Document And Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-document-and-entity-information</Role>
      <ShortName>Document And Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>001 - Statement - Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-consolidated-balance-sheets</Role>
      <ShortName>Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>002 - Statement - Consolidated Balance Sheets (Parentheticals)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-consolidated-balance-sheets-parentheticals</Role>
      <ShortName>Consolidated Balance Sheets (Parentheticals)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>003 - Statement - Consolidated Statements of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-consolidated-statements-of-operations</Role>
      <ShortName>Consolidated Statements of Operations</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>004 - Statement - Condensed Consolidated Statement of Changes in Stockholders' Equity (Deficit) (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-condensed-consolidated-statement-of-changes-in-stockholders-equity-deficit-unaudited</Role>
      <ShortName>Condensed Consolidated Statement of Changes in Stockholders' Equity (Deficit) (Unaudited)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>005 - Statement - Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-consolidated-statements-of-cash-flows</Role>
      <ShortName>Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>995443 - Disclosure - Award Timing Disclosure</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/AwardTimingDisclosure</Role>
      <ShortName>Award Timing Disclosure</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.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>8</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>995447 - Disclosure - Insider Trading Policies and Procedures</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/InsiderTradingPoliciesProc</Role>
      <ShortName>Insider Trading Policies and Procedures</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>995550 - Disclosure - Cybersecurity Risk Management and Strategy Disclosure</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure</Role>
      <ShortName>Cybersecurity Risk Management and Strategy Disclosure</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>995550 - Disclosure - Note 1 - Organization and Business Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-1-organization-and-business-operations</Role>
      <ShortName>Note 1 - Organization and Business Operations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>995551 - Disclosure - Note 2 - Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-2-significant-accounting-policies</Role>
      <ShortName>Note 2 - Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>995552 - Disclosure - Note 3 - Going Concern</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-3-going-concern</Role>
      <ShortName>Note 3 - Going Concern</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>995553 - Disclosure - Note 4 - Oil and Gas Property</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-4-oil-and-gas-property</Role>
      <ShortName>Note 4 - Oil and Gas Property</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>995554 - Disclosure - Note 5 - Supplemental Oil and Gas Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-5-supplemental-oil-and-gas-information</Role>
      <ShortName>Note 5 - Supplemental Oil and Gas Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>995555 - Disclosure - Note 6 - Crypto Assets (Bitcoin)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-6-crypto-assets-bitcoin</Role>
      <ShortName>Note 6 - Crypto Assets (Bitcoin)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>995556 - Disclosure - Note 7 - Loans Payable</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-7-loans-payable</Role>
      <ShortName>Note 7 - Loans Payable</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>995557 - Disclosure - Note 8 - Common Stock Transaction</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-8-common-stock-transaction-</Role>
      <ShortName>Note 8 - Common Stock Transaction</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>995558 - Disclosure - Note 9 - Related Party Note Payable</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-9-related-party-note-payable-</Role>
      <ShortName>Note 9 - Related Party Note Payable</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>995559 - Disclosure - Note 10 - Related Party Transactions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-10-related-party-transactions</Role>
      <ShortName>Note 10 - Related Party Transactions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>995560 - Disclosure - Note 11 - Operating Segments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-11-operating-segments</Role>
      <ShortName>Note 11 - Operating Segments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>995561 - Disclosure - Note 12 - Income Tax</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-12-income-tax</Role>
      <ShortName>Note 12 - Income Tax</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>995562 - Disclosure - Note 13 - Subsequent Events</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-13-subsequent-events</Role>
      <ShortName>Note 13 - Subsequent Events</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>995563 - Disclosure - Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-significant-accounting-policies-policies</Role>
      <ShortName>Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://northernminerals.com/20260731/role/statement-note-2-significant-accounting-policies</ParentRole>
      <Position>24</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>995564 - Disclosure - Note 2 - Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-2-significant-accounting-policies-tables</Role>
      <ShortName>Note 2 - Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://northernminerals.com/20260731/role/statement-note-2-significant-accounting-policies</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>995565 - Disclosure - Note 5 - Supplemental Oil and Gas Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-5-supplemental-oil-and-gas-information-tables</Role>
      <ShortName>Note 5 - Supplemental Oil and Gas Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://northernminerals.com/20260731/role/statement-note-5-supplemental-oil-and-gas-information</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>995566 - Disclosure - Note 6 - Crypto Assets (Bitcoin) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-6-crypto-assets-bitcoin-tables</Role>
      <ShortName>Note 6 - Crypto Assets (Bitcoin) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://northernminerals.com/20260731/role/statement-note-6-crypto-assets-bitcoin</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>995567 - Disclosure - Note 12 - Income Tax (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-12-income-tax-tables</Role>
      <ShortName>Note 12 - Income Tax (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://northernminerals.com/20260731/role/statement-note-12-income-tax</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>995568 - Disclosure - Note 2 - Significant Accounting Policies (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-2-significant-accounting-policies-details-textual</Role>
      <ShortName>Note 2 - Significant Accounting Policies (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://northernminerals.com/20260731/role/statement-note-2-significant-accounting-policies-tables</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>995569 - Disclosure - Note 2 - Significant Accounting Policies - Liabilities Measured at Fair Value on Recurring Basis (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-2-significant-accounting-policies-liabilities-measured-at-fair-value-on-recurring-basis-details</Role>
      <ShortName>Note 2 - Significant Accounting Policies - Liabilities Measured at Fair Value on Recurring Basis (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>995570 - Disclosure - Note 3 - Going Concern (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-3-going-concern-details-textual</Role>
      <ShortName>Note 3 - Going Concern (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://northernminerals.com/20260731/role/statement-note-3-going-concern</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>995571 - Disclosure - Note 4 - Oil and Gas Property (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-4-oil-and-gas-property-details-textual</Role>
      <ShortName>Note 4 - Oil and Gas Property (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://northernminerals.com/20260731/role/statement-note-4-oil-and-gas-property</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>995572 - Disclosure - Note 5 - Supplemental Oil and Gas Information (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-5-supplemental-oil-and-gas-information-details-textual</Role>
      <ShortName>Note 5 - Supplemental Oil and Gas Information (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://northernminerals.com/20260731/role/statement-note-5-supplemental-oil-and-gas-information-tables</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>995573 - Disclosure - Note 5 - Supplemental Oil and Gas Information - Schedule of Oil and Gas (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-5-supplemental-oil-and-gas-information-schedule-of-oil-and-gas-details</Role>
      <ShortName>Note 5 - Supplemental Oil and Gas Information - Schedule of Oil and Gas (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>34</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>995574 - Disclosure - Note 6 - Crypto Assets (Bitcoin) (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-6-crypto-assets-bitcoin-details-textual</Role>
      <ShortName>Note 6 - Crypto Assets (Bitcoin) (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://northernminerals.com/20260731/role/statement-note-6-crypto-assets-bitcoin-tables</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>995575 - Disclosure - Note 6 - Crypto Assets (Bitcoin) - Crypto Asset, Activity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-6-crypto-assets-bitcoin-crypto-asset-activity-details</Role>
      <ShortName>Note 6 - Crypto Assets (Bitcoin) - Crypto Asset, Activity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://northernminerals.com/20260731/role/statement-note-6-crypto-assets-bitcoin-tables</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>995576 - Disclosure - Note 6 - Crypto Assets (Bitcoin) - Crypto Asset, Holding (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-6-crypto-assets-bitcoin-crypto-asset-holding-details</Role>
      <ShortName>Note 6 - Crypto Assets (Bitcoin) - Crypto Asset, Holding (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://northernminerals.com/20260731/role/statement-note-6-crypto-assets-bitcoin-tables</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>995577 - Disclosure - Note 7 - Loans Payable (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-7-loans-payable-details-textual</Role>
      <ShortName>Note 7 - Loans Payable (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://northernminerals.com/20260731/role/statement-note-7-loans-payable</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>995578 - Disclosure - Note 8 - Common Stock Transaction (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-8-common-stock-transaction-details-textual</Role>
      <ShortName>Note 8 - Common Stock Transaction (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://northernminerals.com/20260731/role/statement-note-8-common-stock-transaction-</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>995579 - Disclosure - Note 9 - Related Party Note Payable (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-9-related-party-note-payable-details-textual</Role>
      <ShortName>Note 9 - Related Party Note Payable (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://northernminerals.com/20260731/role/statement-note-9-related-party-note-payable-</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>995580 - Disclosure - Note 10 - Related Party Transactions (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-10-related-party-transactions-details-textual</Role>
      <ShortName>Note 10 - Related Party Transactions (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://northernminerals.com/20260731/role/statement-note-10-related-party-transactions</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>995581 - Disclosure - Note 11 - Operating Segments (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-11-operating-segments-details-textual</Role>
      <ShortName>Note 11 - Operating Segments (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://northernminerals.com/20260731/role/statement-note-11-operating-segments</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>995582 - Disclosure - Note 12 - Income Tax (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-12-income-tax-details-textual</Role>
      <ShortName>Note 12 - Income Tax (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://northernminerals.com/20260731/role/statement-note-12-income-tax-tables</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>995583 - Disclosure - Note 12 - Income Tax - Schedule of Provision for Income tax (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-12-income-tax-schedule-of-provision-for-income-tax-details</Role>
      <ShortName>Note 12 - Income Tax - Schedule of Provision for Income tax (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>995584 - Disclosure - Note 12 - Income Tax - Schedule of Deferred Tax Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-12-income-tax-schedule-of-deferred-tax-assets-details</Role>
      <ShortName>Note 12 - Income Tax - Schedule of Deferred Tax Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>995585 - Disclosure - Note 12 - Income Tax - Schedule of Effective Income Tax Rate Reconciliation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-12-income-tax-schedule-of-effective-income-tax-rate-reconciliation-details</Role>
      <ShortName>Note 12 - Income Tax - Schedule of Effective Income Tax Rate Reconciliation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="nmex20260731_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>995586 - Disclosure - Note 13 - Subsequent Events (Details Textual)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://northernminerals.com/20260731/role/statement-note-13-subsequent-events-details-textual</Role>
      <ShortName>Note 13 - Subsequent Events (Details Textual)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://northernminerals.com/20260731/role/statement-note-13-subsequent-events</ParentRole>
      <Position>47</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>nmex-20260731.xsd</File>
    <File>nmex-20260731_cal.xml</File>
    <File>nmex-20260731_def.xml</File>
    <File>nmex-20260731_lab.xml</File>
    <File>nmex-20260731_pre.xml</File>
    <File doctype="10-K" isDefinitelyFs="true" isUsgaap="true" original="nmex20260731_10k.htm">nmex20260731_10k.htm</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="9">http://fasb.org/srt/2026</BaseTaxonomy>
    <BaseTaxonomy items="395">http://fasb.org/us-gaap/2026</BaseTaxonomy>
    <BaseTaxonomy items="15">http://xbrl.sec.gov/cyd/2026</BaseTaxonomy>
    <BaseTaxonomy items="36">http://xbrl.sec.gov/dei/2026</BaseTaxonomy>
    <BaseTaxonomy items="8">http://xbrl.sec.gov/ecd/2026</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
