<?xml version="1.0" encoding="US-ASCII"?>
<!-- DFIN New ActiveDisclosure (SM) XBRL Schema Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date :2026-06-24T13:21:36.1617+00:00 -->
<!-- Copyright (c) 2026 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
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          <link:loc xlink:type="locator" xlink:href="neog-20251231.xsd#neog_VanguardTargetRetirement2020FundMember" xlink:label="neog_VanguardTargetRetirement2020FundMember"/>
          <link:loc xlink:type="locator" xlink:href="neog-20251231.xsd#neog_VanguardTargetRetirement2040FundMember" xlink:label="neog_VanguardTargetRetirement2040FundMember"/>
          <link:loc xlink:type="locator" xlink:href="neog-20251231.xsd#neog_VanguardTargetRetirement2055FundMember" xlink:label="neog_VanguardTargetRetirement2055FundMember"/>
          <link:loc xlink:type="locator" xlink:href="neog-20251231.xsd#neog_AmericanFundsEuroPacificGrowthFundClassR6Member" xlink:label="neog_AmericanFundsEuroPacificGrowthFundClassR6Member"/>
          <link:loc xlink:type="locator" xlink:href="neog-20251231.xsd#neog_VanguardTargetRetirement2030FundMember" xlink:label="neog_VanguardTargetRetirement2030FundMember"/>
          <link:loc xlink:type="locator" xlink:href="neog-20251231.xsd#neog_VanguardTargetRetirement2065FundMember" xlink:label="neog_VanguardTargetRetirement2065FundMember"/>
          <link:loc xlink:type="locator" xlink:href="neog-20251231.xsd#neog_AllspringSpecialSmallCapValueFundClassR6Member" xlink:label="neog_AllspringSpecialSmallCapValueFundClassR6Member"/>
          <link:loc xlink:type="locator" xlink:href="neog-20251231.xsd#neog_FidelitySmallCapIndexFundMember" xlink:label="neog_FidelitySmallCapIndexFundMember"/>
          <link:loc xlink:type="locator" xlink:href="neog-20251231.xsd#neog_VanguardExplorerFundAdmiralSharesMember" xlink:label="neog_VanguardExplorerFundAdmiralSharesMember"/>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Change in Net Asset Available for Benefit, Increase [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForPaymentToParticipant_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Benefits paid to participants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForPaymentToParticipant_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanTrusteeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Trustee [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanTrusteeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fidelity Management Trust Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanReceivableAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Receivable [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanReceivableAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Receivables:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Level 2</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 2 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Related Party and Party-in-Interest Transactions [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Fiscal Period Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanEmployerContributionReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Employer Contribution, Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanEmployerContributionReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employer contributions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanFullyBenefitResponsiveInvestmentContractTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Fully Benefit-Responsive Investment Contract [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanForm5500CaptionNetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Form 5500 Caption, Net Income (Loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanForm5500CaptionNetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net income per Form 5500</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanTaxStatusAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Tax Status [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanEmployerContributionParticipantCompensationFirstParticipantContributions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee benefit plan employer contribution participant compensation first participant contributions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanEmployerContributionParticipantCompensationFirstParticipantContributions_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Employee benefit plan employer contribution participant compensation first participant contributions.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanEmployerContributionParticipantCompensationFirstParticipantContributions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee benefit plan employer contribution participant compensation first participant contributions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanForfeitedNonvestedAccount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Forfeited Nonvested Account</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanForfeitedNonvestedAccount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Forfeited non-vested accounts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Description of Plan [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Description of Plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestIncomeOnNoteReceivableFromParticipant_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Note Receivable from Participant</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestIncomeOnNoteReceivableFromParticipant_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest income on notes receivable from participants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIdentifierAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Identifier [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Administrative expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Fees paid by plan for custodial, advisory, and record keeping services</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Description of Plan [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Employee Benefit Plan, Description of Plan [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanInvestmentIssuerNameExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Investment, Issuer Name [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Investment, Fair Value and NAV [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Accounting Policy [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Schedule of Asset Held for Investment [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Statement of Net Asset Available for Benefit [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee benefit plan, note receivable from participant, account, maximum borrowing, amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanFairValueMeasurementsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee Benefit Plan, Fair Value Measurements [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanFairValueMeasurementsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Employee benefit plan, fair value measurements policy text block.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanFairValueMeasurementsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Measurements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanCommonCollectiveTrustMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Collective Trust [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanCommonCollectiveTrustMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Collective Investment Trusts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DefinedBenefitPlanCommonCollectiveTrustMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Collective Trust Fund</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AmendmentFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amendment Flag</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForEmployerContribution_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash and Noncash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForEmployerContribution_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Employee Benefit Plan, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash and Noncash, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForEmployerContribution_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employer contributions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deductions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Change in Net Asset Available for Benefit, Decrease [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanPaymentToParticipantPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Payment to Participant [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanPaymentToParticipantPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payments of Benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500ChangeInNetAssetAvailableForBenefitIncreaseDecreaseForDeemedDistribution_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Reconciliation to Form 5500, Change in Net Asset Available for Benefit, Increase (Decrease) from Deemed Distribution</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500ChangeInNetAssetAvailableForBenefitIncreaseDecreaseForDeemedDistribution_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Employee Benefit Plan, Reconciliation to Form 5500, Change in Net Asset Available for Benefit, Increase (Decrease) from Deemed Distribution, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500ChangeInNetAssetAvailableForBenefitIncreaseDecreaseForDeemedDistribution_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in deemed distributions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanParticipantContributionReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Participant Contribution, Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanParticipantContributionReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee contributions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Schedule of Asset Held for Investment [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Hierarchy and NAV [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanInvestmentTypeExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Investment, Current Value, Type [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentType_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanParticipantContributionsDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee Benefit Plan, Participant Contributions, Description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanParticipantContributionsDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Employee benefit plan, participant contributions, description.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanParticipantContributionsDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Participant contributions description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Central Index Key</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanInvestmentPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment Valuation and Income Recognition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanInvestmentPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Investment [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Accounting Policy [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanBasisOfAccountingPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Basis of Accounting [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanBasisOfAccountingPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basis of Accounting</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current Fiscal Year End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Description of Plan [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanScheduleOfAssetsHeldForInvestmentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Employee benefit plan schedule of assets held for investments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanScheduleOfAssetsHeldForInvestmentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee Benefit Plan Schedule of Assets Held For Investments [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanScheduleOfAssetsHeldForInvestmentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanEmployerCommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Employer, Common Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanEmployerCommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Stock of Plan Sponsor</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanEmployerCommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Employer Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestAndDividendIncomeOnInvestment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestAndDividendIncomeOnInvestment_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Employee Benefit Plan, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestAndDividendIncomeOnInvestment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest and dividends</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Investment, Fair Value [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investments, at fair value:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanForm5500CaptionNetAssetAvailableForBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Form 5500 Caption, Net Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanForm5500CaptionNetAssetAvailableForBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net assets available for benefits per the Form 5500</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForOtherContribution_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other contributions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForOtherContribution_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee Benefit Plan Change In Net Asset Available For Benefit Increase For Other Contribution</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForOtherContribution_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Employee benefit plan change in net asset available for benefit increase for other contribution.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanInvestmentNumberOfShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Investment, Number of Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanInvestmentNumberOfShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment in common stock, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Minimum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Related Party and Party-in-Interest Transactions [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Parties-In-Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncrease_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Change in Net Asset Available for Benefit, Increase</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncrease_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total additions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 3 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Level 3</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContribution_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total contributions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContribution_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Change in Net Asset Available for Benefit, Increase from Contribution</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500LineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Reconciliation of Financial Statement to Form 5500 [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanExpensePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Expense [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanExpensePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_CommonStockOfPlanSponsorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock of Plan Sponsor [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_CommonStockOfPlanSponsorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Common stock of Plan Sponsor.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_CommonStockOfPlanSponsorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Stock of Plan Sponsor</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentInformationLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Information [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measured at Net Asset Value Per Share [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment Measured at Net Asset Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Statement of Net Asset Available for Benefit [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContributionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Change in Net Asset Available for Benefit, Increase from Contribution [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContributionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contributions:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanTaxDeterminationLetterDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Tax Determination Letter, Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanTaxDeterminationLetterDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Opinion letter received, date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Related Party and Party-in-Interest Transactions [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanInvestmentExcludingPlanInterestInMasterTrustFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanInvestmentExcludingPlanInterestInMasterTrustFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanInvestmentExcludingPlanInterestInMasterTrustFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Employee Benefit Plan, Investment, Excluding Plan Interest in Master Trust, Fair Value, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanInvestmentExcludingPlanInterestInMasterTrustFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investments at fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanInvestmentExcludingPlanInterestInMasterTrustFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Total Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanInvestmentExcludingPlanInterestInMasterTrustFairValue_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Investment in common stock, value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanUseOfEstimatePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Use of Estimate [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanUseOfEstimatePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Use of Estimates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MutualFundMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Mutual Fund [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MutualFundMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Mutual Funds</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanSummaryOfAccountingPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Summary of Accounting Policy [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanSummaryOfAccountingPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Significant Accounting Policies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Measurements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Investment, Fair Value and NAV [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Description of Plan and Accounting Change [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500TableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Reconciliation of Financial Statement to Form 5500 [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500TableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Reconciliation of Net Assets and Changes in Net Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentParticipantLoanAfterDeemedDistribution_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentParticipantLoanAfterDeemedDistribution_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Notes receivable from participants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Statement of Change in Net Asset Available for Benefit [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statistical Measurement [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanExcessContributionPayablePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Excess Contribution Payable [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanExcessContributionPayablePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Excess Contributions Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipant_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Note Receivable from Participant</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipant_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Notes receivable from participants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Period End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Hierarchy and NAV [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlansMutualFundsAndCommonStockOfPlanSponsorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee Benefit Plans Mutual Funds and Common Stock of Plan Sponsor [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlansMutualFundsAndCommonStockOfPlanSponsorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Employee benefit plans mutual funds and common stock of plan sponsor.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlansMutualFundsAndCommonStockOfPlanSponsorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee Benefit Plans Mutual Funds and Common Stock of Plan Sponsor</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingToTotalAccountPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingToTotalAccountPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee benefit plan, note receivable from participant, account, maximum borrowing, to total account, percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanTaxDeterminationLetterObtained_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Tax Determination Letter, Obtained [true false]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanTaxDeterminationLetterObtained_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Opinion letter obtained</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Related Party and Party-in-Interest Transactions [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanPlanTerminationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Plan Termination [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanPlanTerminationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan Termination</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanSubsequentEventTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Subsequent Event [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanSubsequentEventTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Events</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CoverAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cover [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanNetAssetValuePerShareOrUnit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Net Asset Value per Share or Unit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanNetAssetValuePerShareOrUnit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment in common stock, market price per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentTypeCategorizationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentageNextParticipantContribution_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee Benefit Plan Employer Contribution Participant Compensation Matched Percentage Next Participant Contribution</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentageNextParticipantContribution_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Employee benefit plan employer contribution participant compensation matched percentage next participant contribution.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentageNextParticipantContribution_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee benefit plan employer contribution participant compensation matched percentage next participant contribution</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForIncomeLossOnInvestmentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment income:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForIncomeLossOnInvestmentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Net assets available for benefits at beginning of year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Net assets available for benefits at end of year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Net Asset Available for Benefit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total Assets (equal to net assets available for benefits)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanNetAssetAvailableForBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net assets available for benefits per the financial statements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Investment, Fair Value and NAV [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Fair Value Hierarchy of Plan's Assets and Fair Value of Investments Measured at Net Asset Value Per Share as Practical Expedient</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Schedule of Asset Held for Investment [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentPlanInterestInMasterTrustParticipationStatusExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Asset Held for Investment, Plan Interest in Master Trust, Participation Status [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanFairValueInvestmentNetAssetValueRedemptionFrequency_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Redemption Frequency</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanFairValueInvestmentNetAssetValueRedemptionFrequency_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee benefit plan, fair value, investment, net asset value redemption frequency</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanFairValueInvestmentNetAssetValueRedemptionFrequency_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Employee benefit plan, fair value, investment, net asset value redemption frequency.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentInvestmentExcludingPlanInterestInMasterTrustCurrentValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Asset Held for Investment, Investment, Excluding Plan Interest in Master Trust, Current Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestmentInvestmentExcludingPlanInterestInMasterTrustCurrentValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee benefit plan, asset held for investment, excluding plan interest in master trust, current value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Note Receivable from Participant [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanNoteReceivableFromParticipantPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Notes Receivable from Participants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Schedule of Asset Held for Investment [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Assets Held at End of Year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanFullyBenefitResponsiveInvestmentContractAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Fully Benefit-Responsive Investment Contract [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanStatementOfNetAssetAvailableForBenefitTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Statement of Net Asset Available for Benefit [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalYearFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Fiscal Year Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForGainLossOnInvestment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForGainLossOnInvestment_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Employee Benefit Plan, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForGainLossOnInvestment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net appreciation in fair value of investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Employer Contribution, Participant Compensation Matched, Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee benefit plan employer contribution participant compensation matched percentage first participant contribution</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Statement of Change in Net Asset Available for Benefit [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanSubsequentEventsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee Benefit Plan, Subsequent Events [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanSubsequentEventsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanContributionPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Contribution [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanContributionPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Contributions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanFullyBenefitResponsiveInvestmentContractLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Fully Benefit-Responsive Investment Contract [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanPlanNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">EBP, Plan Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanPlanNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Plan Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Investment, Fair Value and NAV [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentInformationTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Information [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LegalEntityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Legal Entity [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EbpPlanName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Plan Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500NetAssetAvailableForBenefitDeemedDistribution_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Reconciliation to Form 5500, Net Asset Available for Benefit, Deemed Distribution</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500NetAssetAvailableForBenefitDeemedDistribution_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deemed distributions reported on 5500</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500NetAssetAvailableForBenefitDeemedDistribution_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Deemed distributions reported on 5500</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanEmployerContributionParticipantCompensationNextParticipantContributions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee benefit plan employer contribution participant compensation next participant contributions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanEmployerContributionParticipantCompensationNextParticipantContributions_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Employee benefit plan employer contribution participant compensation next participant contributions.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanEmployerContributionParticipantCompensationNextParticipantContributions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee benefit plan employer contribution participant compensation next participant contributions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanAssetAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Asset [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanAssetAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanSubsequentEventsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee Benefit Plan, Subsequent Events [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanSubsequentEventsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of information about subsequent events of employee stock purchase, saving, or similar plan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanInvestmentFairValueAndNavTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Investment, Fair Value and NAV [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanPlanTerminationParticipantsPercentageVestedInAccounts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee Benefit Plan, Plan Termination, Participants Percentage Vested in Accounts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanPlanTerminationParticipantsPercentageVestedInAccounts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Employee benefit plan, plan termination, participants percentage vested in accounts.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanPlanTerminationParticipantsPercentageVestedInAccounts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage vested by participants, if Plan is terminated</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanAccountingPolicyAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Accounting Policy, Accounting Standard Update, and Change in Accounting Principle [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Asset Held for Investment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanAssetHeldForInvestment_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">TOTAL</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Table_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Reconciliation of Financial Statement to Form 5500 [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanTaxStatusTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Tax Status [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanTaxStatusTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Federal Income Tax Status</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maximum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statistical Measurement [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanStatementOfChangeInNetAssetAvailableForBenefitAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Statement of Change in Net Asset Available for Benefit [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanForfeitedNonvestedAccountUtilized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee Benefit Plan, Forfeited Nonvested Account Utilized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanForfeitedNonvestedAccountUtilized_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Employee benefit plan, forfeited nonvested account utilized.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanForfeitedNonvestedAccountUtilized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Forfeited nonvested accounts utilized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityRegistrantName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Registrant Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total Receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanParticipantLoanInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Asset Held for Investment, Participant Loan, Interest Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanParticipantLoanInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee benefit plan, asset held for investment, participant loan, interest rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500TextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reconciliation of Financial Statements to Form 5500</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500TextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Reconciliation of Financial Statement to Form 5500 [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanSubsequentEventsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee Benefit Plan, Subsequent Events [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanSubsequentEventsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Abstract of subsequent events.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Related Party and Party-in-Interest [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanRelatedPartyAndPartyInInterestAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Related Party and Party-in-Interest [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanReconciliationToForm5500Abstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Reconciliation of Financial Statement to Form 5500 [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanRiskAndUncertaintyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Risks and Uncertainties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanRiskAndUncertaintyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Risk and Uncertainty [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EBP001Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">EBP 001</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EBP001Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP 001 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EBP001Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">EBP 001.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanFairValueInvestmentNetAssetValueRedemptionNoticePeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee benefit plan, fair value, investment, net asset value redemption, notice period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanFairValueInvestmentNetAssetValueRedemptionNoticePeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Employee benefit plan, fair value, investment, net asset value redemption, notice period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="neog_EmployeeBenefitPlanFairValueInvestmentNetAssetValueRedemptionNoticePeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Redemption Notice Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Change in Net Asset Available for Benefit, Decrease</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total deductions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 1 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Level 1</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForParticipantContribution_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForParticipantContribution_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Employee Benefit Plan, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForParticipantContribution_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee contributions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanTaxStatusLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Tax Status [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Tax Identification Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanParticipantLoanMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Asset Held for Investment, Participant Loan, Maturity Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanParticipantLoanMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee benefit plan, asset held for investment, participant loan, maturity date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap-ebp_EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EBP, Change in Net Asset Available for Benefit, Increase (Decrease)</link:label>
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