<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.26.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>77</ContextCount>
  <ElementCount>247</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>22</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>4</UnitCount>
  <MyReports>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>000010 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>000020 - Statement - BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_StatementBalanceSheets</Role>
      <ShortName>BALANCE SHEETS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>000030 - Statement - BALANCE SHEETS - Parenthetical</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_StatementBalanceSheetsParenthetical</Role>
      <ShortName>BALANCE SHEETS - Parenthetical</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>000040 - Statement - STATEMENTS OF INCOME</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_StatementStatementsOfIncome</Role>
      <ShortName>STATEMENTS OF INCOME</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>000050 - Statement - STATEMENTS OF COMPREHENSIVE INCOME</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_StatementStatementsOfComprehensiveIncome</Role>
      <ShortName>STATEMENTS OF COMPREHENSIVE INCOME</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>000060 - Statement - STATEMENTS OF SHAREHOLDERS' EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_StatementStatementsOfShareholdersEquity</Role>
      <ShortName>STATEMENTS OF SHAREHOLDERS' EQUITY</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>000070 - Statement - STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_StatementStatementsOfCashFlows</Role>
      <ShortName>STATEMENTS OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>000080 - Disclosure - NOTE 1. BASIS OF PRESENTATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote1BasisOfPresentation</Role>
      <ShortName>NOTE 1. BASIS OF PRESENTATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>000090 - Disclosure - NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote2SummaryOfSignificantAccountingPolicies</Role>
      <ShortName>NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>000100 - Disclosure - NOTE 3. RECENTLY ADOPTED ACCOUNTING STANDARDS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote3RecentlyAdoptedAccountingStandards</Role>
      <ShortName>NOTE 3. RECENTLY ADOPTED ACCOUNTING STANDARDS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>000110 - Disclosure - NOTE 4. NEW ACCOUNTING STANDARDS NOT YET ADOPTED</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote4NewAccountingStandardsNotYetAdopted</Role>
      <ShortName>NOTE 4. NEW ACCOUNTING STANDARDS NOT YET ADOPTED</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>000120 - Disclosure - NOTE 5. MARKETABLE SECURITIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote5MarketableSecurities</Role>
      <ShortName>NOTE 5. MARKETABLE SECURITIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>000130 - Disclosure - NOTE 6. INVENTORIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote6Inventories</Role>
      <ShortName>NOTE 6. INVENTORIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>000140 - Disclosure - NOTE 7. STOCK-BASED COMPENSATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote7StockBasedCompensation</Role>
      <ShortName>NOTE 7. STOCK-BASED COMPENSATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>000150 - Disclosure - NOTE 8. INCOME TAXES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote8IncomeTaxes</Role>
      <ShortName>NOTE 8. INCOME TAXES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>000160 - Disclosure - NOTE 9. LEASES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote9Leases</Role>
      <ShortName>NOTE 9. LEASES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>000170 - Disclosure - NOTE 10. CONCENTRATIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote10Concentrations</Role>
      <ShortName>NOTE 10. CONCENTRATIONS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>000180 - Disclosure - NOTE 11. STOCK REPURCHASE PROGRAM</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote11StockRepurchaseProgram</Role>
      <ShortName>NOTE 11. STOCK REPURCHASE PROGRAM</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>000190 - Disclosure - NOTE 12. INFORMATION AS TO EMPLOYEE STOCK PURCHASE, SAVINGS, AND SIMILAR PLANS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote12InformationAsToEmployeeStockPurchaseSavingsAndSimilarPlans</Role>
      <ShortName>NOTE 12. INFORMATION AS TO EMPLOYEE STOCK PURCHASE, SAVINGS, AND SIMILAR PLANS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>000200 - Disclosure - NOTE 13. SUBSEQUENT EVENT</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote13SubsequentEvent</Role>
      <ShortName>NOTE 13. SUBSEQUENT EVENT</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>000210 - Disclosure - NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Cash and Cash Equivalents (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote2SummaryOfSignificantAccountingPoliciesCashAndCashEquivalentsPolicies</Role>
      <ShortName>NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Cash and Cash Equivalents (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>000220 - Disclosure - NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Concentration of Risk and Financial Instruments (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote2SummaryOfSignificantAccountingPoliciesConcentrationOfRiskAndFinancialInstrumentsPolicies</Role>
      <ShortName>NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Concentration of Risk and Financial Instruments (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>000230 - Disclosure - NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Accounts Receivable and Allowance for Credit Losses (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote2SummaryOfSignificantAccountingPoliciesAccountsReceivableAndAllowanceForCreditLossesPolicies</Role>
      <ShortName>NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Accounts Receivable and Allowance for Credit Losses (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>000240 - Disclosure - NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Inventories (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote2SummaryOfSignificantAccountingPoliciesInventoriesPolicies</Role>
      <ShortName>NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Inventories (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>000250 - Disclosure - NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Product Warranty (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote2SummaryOfSignificantAccountingPoliciesProductWarrantyPolicies</Role>
      <ShortName>NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Product Warranty (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>000260 - Disclosure - NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Fixed Assets (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote2SummaryOfSignificantAccountingPoliciesFixedAssetsPolicies</Role>
      <ShortName>NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Fixed Assets (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>000270 - Disclosure - NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Revenue Recognition (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote2SummaryOfSignificantAccountingPoliciesRevenueRecognitionPolicies</Role>
      <ShortName>NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Revenue Recognition (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>000280 - Disclosure - NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Income Taxes (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote2SummaryOfSignificantAccountingPoliciesIncomeTaxesPolicies</Role>
      <ShortName>NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Income Taxes (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>000290 - Disclosure - NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Research and Development Expense Recognition (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote2SummaryOfSignificantAccountingPoliciesResearchAndDevelopmentExpenseRecognitionPolicies</Role>
      <ShortName>NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Research and Development Expense Recognition (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>000300 - Disclosure - NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Stock-Based Compensation (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote2SummaryOfSignificantAccountingPoliciesStockBasedCompensationPolicies</Role>
      <ShortName>NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Stock-Based Compensation (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>000310 - Disclosure - NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Net Income Per Share (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote2SummaryOfSignificantAccountingPoliciesNetIncomePerSharePolicies</Role>
      <ShortName>NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Net Income Per Share (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>000320 - Disclosure - NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Use of Estimates (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote2SummaryOfSignificantAccountingPoliciesUseOfEstimatesPolicies</Role>
      <ShortName>NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Use of Estimates (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>32</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>000330 - Disclosure - NOTE 8. INCOME TAXES: Schedule of Deferred Tax Assets and Liabilities (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote8IncomeTaxesScheduleOfDeferredTaxAssetsAndLiabilitiesPolicies</Role>
      <ShortName>NOTE 8. INCOME TAXES: Schedule of Deferred Tax Assets and Liabilities (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>000340 - Disclosure - NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Marketable securities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote2SummaryOfSignificantAccountingPoliciesMarketableSecuritiesTables</Role>
      <ShortName>NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Marketable securities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>34</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>000350 - Disclosure - NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Net Income Per Share: Schedule of Earnings Per Share, Basic and Diluted (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote2SummaryOfSignificantAccountingPoliciesNetIncomePerShareScheduleOfEarningsPerShareBasicAndDilutedTables</Role>
      <ShortName>NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Net Income Per Share: Schedule of Earnings Per Share, Basic and Diluted (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>000360 - Disclosure - NOTE 5. MARKETABLE SECURITIES: Fair Value of available-for-sale securities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote5MarketableSecuritiesFairValueOfAvailableForSaleSecuritiesTables</Role>
      <ShortName>NOTE 5. MARKETABLE SECURITIES: Fair Value of available-for-sale securities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>000370 - Disclosure - NOTE 5. MARKETABLE SECURITIES: Estimated fair value of assets that were accounted for at fair value on a recurring basis (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote5MarketableSecuritiesEstimatedFairValueOfAssetsThatWereAccountedForAtFairValueOnARecurringBasisTables</Role>
      <ShortName>NOTE 5. MARKETABLE SECURITIES: Estimated fair value of assets that were accounted for at fair value on a recurring basis (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>000380 - Disclosure - NOTE 5. MARKETABLE SECURITIES: Available-for-Sale Securities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote5MarketableSecuritiesAvailableForSaleSecuritiesTables</Role>
      <ShortName>NOTE 5. MARKETABLE SECURITIES: Available-for-Sale Securities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>000390 - Disclosure - NOTE 5. MARKETABLE SECURITIES: Gross unrealized holding losses and fair value of available-for-sale securities with unrealized holding losses (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote5MarketableSecuritiesGrossUnrealizedHoldingLossesAndFairValueOfAvailableForSaleSecuritiesWithUnrealizedHoldingLossesTables</Role>
      <ShortName>NOTE 5. MARKETABLE SECURITIES: Gross unrealized holding losses and fair value of available-for-sale securities with unrealized holding losses (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>000400 - Disclosure - NOTE 5. MARKETABLE SECURITIES: Unrealized Gain (Loss) on Investments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote5MarketableSecuritiesUnrealizedGainLossOnInvestmentsTables</Role>
      <ShortName>NOTE 5. MARKETABLE SECURITIES: Unrealized Gain (Loss) on Investments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>40</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>000410 - Disclosure - NOTE 6. INVENTORIES: Schedule of Inventory (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote6InventoriesScheduleOfInventoryTables</Role>
      <ShortName>NOTE 6. INVENTORIES: Schedule of Inventory (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>000420 - Disclosure - NOTE 7. STOCK-BASED COMPENSATION: Schedule of Fair value of stock options (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote7StockBasedCompensationScheduleOfFairValueOfStockOptionsTables</Role>
      <ShortName>NOTE 7. STOCK-BASED COMPENSATION: Schedule of Fair value of stock options (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>000430 - Disclosure - NOTE 7. STOCK-BASED COMPENSATION: Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote7StockBasedCompensationDisclosureOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTables</Role>
      <ShortName>NOTE 7. STOCK-BASED COMPENSATION: Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>43</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>000440 - Disclosure - NOTE 7. STOCK-BASED COMPENSATION: Schedule of Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Grant Date Intrinsic Value (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote7StockBasedCompensationScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrantDateIntrinsicValueTables</Role>
      <ShortName>NOTE 7. STOCK-BASED COMPENSATION: Schedule of Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Grant Date Intrinsic Value (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>000450 - Disclosure - NOTE 8. INCOME TAXES: Schedule of Components of Income Tax Expense (Benefit) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote8IncomeTaxesScheduleOfComponentsOfIncomeTaxExpenseBenefitTables</Role>
      <ShortName>NOTE 8. INCOME TAXES: Schedule of Components of Income Tax Expense (Benefit) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>000460 - Disclosure - NOTE 8. INCOME TAXES: Schedule of Effective Income Tax Rate Reconciliation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote8IncomeTaxesScheduleOfEffectiveIncomeTaxRateReconciliationTables</Role>
      <ShortName>NOTE 8. INCOME TAXES: Schedule of Effective Income Tax Rate Reconciliation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>000470 - Disclosure - NOTE 8. INCOME TAXES: Schedule of income taxes disaggregated by federal and state (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote8IncomeTaxesScheduleOfIncomeTaxesDisaggregatedByFederalAndStateTables</Role>
      <ShortName>NOTE 8. INCOME TAXES: Schedule of income taxes disaggregated by federal and state (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>000480 - Disclosure - NOTE 9. LEASES: Lease, Cost (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote9LeasesLeaseCostTables</Role>
      <ShortName>NOTE 9. LEASES: Lease, Cost (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>000490 - Disclosure - NOTE 9. LEASES: Lessee, Operating Lease, Liability, Maturity (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote9LeasesLesseeOperatingLeaseLiabilityMaturityTables</Role>
      <ShortName>NOTE 9. LEASES: Lessee, Operating Lease, Liability, Maturity (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>000500 - Disclosure - NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Net Income Per Share: Schedule of Earnings Per Share, Basic and Diluted (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote2SummaryOfSignificantAccountingPoliciesNetIncomePerShareScheduleOfEarningsPerShareBasicAndDilutedDetails</Role>
      <ShortName>NOTE 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: Net Income Per Share: Schedule of Earnings Per Share, Basic and Diluted (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://nve.com/20260331/role/idr_DisclosureNote2SummaryOfSignificantAccountingPoliciesNetIncomePerShareScheduleOfEarningsPerShareBasicAndDilutedTables</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>000510 - Disclosure - NOTE 5. MARKETABLE SECURITIES: Fair Value of available-for-sale securities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote5MarketableSecuritiesFairValueOfAvailableForSaleSecuritiesDetails</Role>
      <ShortName>NOTE 5. MARKETABLE SECURITIES: Fair Value of available-for-sale securities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://nve.com/20260331/role/idr_DisclosureNote5MarketableSecuritiesFairValueOfAvailableForSaleSecuritiesTables</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>000520 - Disclosure - NOTE 5. MARKETABLE SECURITIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote5MarketableSecuritiesDetails</Role>
      <ShortName>NOTE 5. MARKETABLE SECURITIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://nve.com/20260331/role/idr_DisclosureNote5MarketableSecuritiesFairValueOfAvailableForSaleSecuritiesTables</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>000530 - Disclosure - NOTE 5. MARKETABLE SECURITIES: Estimated fair value of assets that were accounted for at fair value on a recurring basis (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote5MarketableSecuritiesEstimatedFairValueOfAssetsThatWereAccountedForAtFairValueOnARecurringBasisDetails</Role>
      <ShortName>NOTE 5. MARKETABLE SECURITIES: Estimated fair value of assets that were accounted for at fair value on a recurring basis (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://nve.com/20260331/role/idr_DisclosureNote5MarketableSecuritiesEstimatedFairValueOfAssetsThatWereAccountedForAtFairValueOnARecurringBasisTables</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>000540 - Disclosure - NOTE 5. MARKETABLE SECURITIES: Available-for-Sale Securities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote5MarketableSecuritiesAvailableForSaleSecuritiesDetails</Role>
      <ShortName>NOTE 5. MARKETABLE SECURITIES: Available-for-Sale Securities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://nve.com/20260331/role/idr_DisclosureNote5MarketableSecuritiesAvailableForSaleSecuritiesTables</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>000550 - Disclosure - NOTE 5. MARKETABLE SECURITIES: Gross unrealized holding losses and fair value of available-for-sale securities with unrealized holding losses (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote5MarketableSecuritiesGrossUnrealizedHoldingLossesAndFairValueOfAvailableForSaleSecuritiesWithUnrealizedHoldingLossesDetails</Role>
      <ShortName>NOTE 5. MARKETABLE SECURITIES: Gross unrealized holding losses and fair value of available-for-sale securities with unrealized holding losses (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://nve.com/20260331/role/idr_DisclosureNote5MarketableSecuritiesGrossUnrealizedHoldingLossesAndFairValueOfAvailableForSaleSecuritiesWithUnrealizedHoldingLossesTables</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>000560 - Disclosure - NOTE 5. MARKETABLE SECURITIES: Unrealized Gain (Loss) on Investments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote5MarketableSecuritiesUnrealizedGainLossOnInvestmentsDetails</Role>
      <ShortName>NOTE 5. MARKETABLE SECURITIES: Unrealized Gain (Loss) on Investments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://nve.com/20260331/role/idr_DisclosureNote5MarketableSecuritiesUnrealizedGainLossOnInvestmentsTables</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>000570 - Disclosure - NOTE 6. INVENTORIES: Schedule of Inventory (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote6InventoriesScheduleOfInventoryDetails</Role>
      <ShortName>NOTE 6. INVENTORIES: Schedule of Inventory (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://nve.com/20260331/role/idr_DisclosureNote6InventoriesScheduleOfInventoryTables</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>000580 - Disclosure - NOTE 7. STOCK-BASED COMPENSATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote7StockBasedCompensationDetails</Role>
      <ShortName>NOTE 7. STOCK-BASED COMPENSATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://nve.com/20260331/role/idr_DisclosureNote7StockBasedCompensationScheduleOfFairValueOfStockOptionsTables</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>000590 - Disclosure - NOTE 7. STOCK-BASED COMPENSATION: Schedule of Fair value of stock options (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote7StockBasedCompensationScheduleOfFairValueOfStockOptionsDetails</Role>
      <ShortName>NOTE 7. STOCK-BASED COMPENSATION: Schedule of Fair value of stock options (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://nve.com/20260331/role/idr_DisclosureNote7StockBasedCompensationScheduleOfFairValueOfStockOptionsTables</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>000600 - Disclosure - NOTE 7. STOCK-BASED COMPENSATION: Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote7StockBasedCompensationDisclosureOfShareBasedCompensationArrangementsByShareBasedPaymentAwardDetails</Role>
      <ShortName>NOTE 7. STOCK-BASED COMPENSATION: Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://nve.com/20260331/role/idr_DisclosureNote7StockBasedCompensationDisclosureOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTables</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>000610 - Disclosure - NOTE 7. STOCK-BASED COMPENSATION: Schedule of Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Grant Date Intrinsic Value (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote7StockBasedCompensationScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrantDateIntrinsicValueDetails</Role>
      <ShortName>NOTE 7. STOCK-BASED COMPENSATION: Schedule of Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Grant Date Intrinsic Value (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://nve.com/20260331/role/idr_DisclosureNote7StockBasedCompensationScheduleOfShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrantDateIntrinsicValueTables</ParentRole>
      <Position>61</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>000620 - Disclosure - NOTE 8. INCOME TAXES: Schedule of Components of Income Tax Expense (Benefit) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote8IncomeTaxesScheduleOfComponentsOfIncomeTaxExpenseBenefitDetails</Role>
      <ShortName>NOTE 8. INCOME TAXES: Schedule of Components of Income Tax Expense (Benefit) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://nve.com/20260331/role/idr_DisclosureNote8IncomeTaxesScheduleOfComponentsOfIncomeTaxExpenseBenefitTables</ParentRole>
      <Position>62</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>000630 - Disclosure - NOTE 8. INCOME TAXES: Schedule of Effective Income Tax Rate Reconciliation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote8IncomeTaxesScheduleOfEffectiveIncomeTaxRateReconciliationDetails</Role>
      <ShortName>NOTE 8. INCOME TAXES: Schedule of Effective Income Tax Rate Reconciliation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://nve.com/20260331/role/idr_DisclosureNote8IncomeTaxesScheduleOfEffectiveIncomeTaxRateReconciliationTables</ParentRole>
      <Position>63</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>000640 - Disclosure - NOTE 8. INCOME TAXES: Schedule of income taxes disaggregated by federal and state (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote8IncomeTaxesScheduleOfIncomeTaxesDisaggregatedByFederalAndStateDetails</Role>
      <ShortName>NOTE 8. INCOME TAXES: Schedule of income taxes disaggregated by federal and state (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://nve.com/20260331/role/idr_DisclosureNote8IncomeTaxesScheduleOfIncomeTaxesDisaggregatedByFederalAndStateTables</ParentRole>
      <Position>64</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>000650 - Disclosure - NOTE 8. INCOME TAXES: Schedule of Deferred Tax Assets and Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote8IncomeTaxesScheduleOfDeferredTaxAssetsAndLiabilitiesDetails</Role>
      <ShortName>NOTE 8. INCOME TAXES: Schedule of Deferred Tax Assets and Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://nve.com/20260331/role/idr_DisclosureNote8IncomeTaxesScheduleOfDeferredTaxAssetsAndLiabilitiesPolicies</ParentRole>
      <Position>65</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>000660 - Disclosure - NOTE 8. INCOME TAXES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote8IncomeTaxesDetails</Role>
      <ShortName>NOTE 8. INCOME TAXES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://nve.com/20260331/role/idr_DisclosureNote8IncomeTaxesScheduleOfComponentsOfIncomeTaxExpenseBenefitTables</ParentRole>
      <Position>66</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>000670 - Disclosure - NOTE 9. LEASES: Lease, Cost (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote9LeasesLeaseCostDetails</Role>
      <ShortName>NOTE 9. LEASES: Lease, Cost (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://nve.com/20260331/role/idr_DisclosureNote9LeasesLeaseCostTables</ParentRole>
      <Position>67</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>000680 - Disclosure - NOTE 9. LEASES: Lessee, Operating Lease, Liability, Maturity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote9LeasesLesseeOperatingLeaseLiabilityMaturityDetails</Role>
      <ShortName>NOTE 9. LEASES: Lessee, Operating Lease, Liability, Maturity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://nve.com/20260331/role/idr_DisclosureNote9LeasesLesseeOperatingLeaseLiabilityMaturityTables</ParentRole>
      <Position>68</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>000690 - Disclosure - NOTE 10. CONCENTRATIONS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote10ConcentrationsDetails</Role>
      <ShortName>NOTE 10. CONCENTRATIONS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://nve.com/20260331/role/idr_DisclosureNote10Concentrations</ParentRole>
      <Position>69</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>000700 - Disclosure - NOTE 11. STOCK REPURCHASE PROGRAM (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote11StockRepurchaseProgramDetails</Role>
      <ShortName>NOTE 11. STOCK REPURCHASE PROGRAM (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://nve.com/20260331/role/idr_DisclosureNote11StockRepurchaseProgram</ParentRole>
      <Position>70</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>000710 - Disclosure - NOTE 12. INFORMATION AS TO EMPLOYEE STOCK PURCHASE, SAVINGS, AND SIMILAR PLANS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote12InformationAsToEmployeeStockPurchaseSavingsAndSimilarPlansDetails</Role>
      <ShortName>NOTE 12. INFORMATION AS TO EMPLOYEE STOCK PURCHASE, SAVINGS, AND SIMILAR PLANS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://nve.com/20260331/role/idr_DisclosureNote12InformationAsToEmployeeStockPurchaseSavingsAndSimilarPlans</ParentRole>
      <Position>71</Position>
    </Report>
    <Report instance="nvec-20260331_10k.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>000720 - Disclosure - NOTE 13. SUBSEQUENT EVENT (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://nve.com/20260331/role/idr_DisclosureNote13SubsequentEventDetails</Role>
      <ShortName>NOTE 13. SUBSEQUENT EVENT (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://nve.com/20260331/role/idr_DisclosureNote13SubsequentEvent</ParentRole>
      <Position>72</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>nvec-20260331.xsd</File>
    <File doctype="10-K" isDefinitelyFs="true" isUsgaap="true" original="nvec-20260331_10k.htm">nvec-20260331_10k.htm</File>
    <File>nvec-20260331_cal.xml</File>
    <File>nvec-20260331_def.xml</File>
    <File>nvec-20260331_lab.xml</File>
    <File>nvec-20260331_pre.xml</File>
  </InputFiles>
  <SupplementalFiles>
    <File>nve10k_1.jpg</File>
    <File>nve10k_2.jpg</File>
  </SupplementalFiles>
  <BaseTaxonomies>
    <BaseTaxonomy items="2">http://fasb.org/srt/2026</BaseTaxonomy>
    <BaseTaxonomy items="469">http://fasb.org/us-gaap/2026</BaseTaxonomy>
    <BaseTaxonomy items="40">http://xbrl.sec.gov/dei/2026</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
