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| <link:definition xmlns="http://www.xbrl.org/2003/linkbase"> 021 - Disclosure - Note 4 - Earnings Per Common Share (EPS) (Details Textual) </link:definition> |
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| <link:definition xmlns="http://www.xbrl.org/2003/linkbase"> 028 - Disclosure - Note 7 - Income Taxes (Details Textual) </link:definition> |
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| <link:definition xmlns="http://www.xbrl.org/2003/linkbase"> 029 - Disclosure - Note 8 - Long-term Debt (Details Textual) </link:definition> |
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| <xsd:element id="iknx_LandAndBuilding" name="LandAndBuilding" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/> |
| <xsd:element abstract="true" id="iknx_LoanMember" name="LoanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="iknx_NoteToFinancialStatementDetailsTextual" name="NoteToFinancialStatementDetailsTextual" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="iknx_NotesToFinancialStatements" name="NotesToFinancialStatements" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="iknx_NotesToFinancialStatementsAbstract" name="NotesToFinancialStatementsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/> |
| <xsd:element id="iknx_ProceedsFromPaycheckProtectionProgramUnderCaresAct" name="ProceedsFromPaycheckProtectionProgramUnderCaresAct" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/> |
| <xsd:element id="iknx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWithAntidilutiveEffectWeightedAverageExercisePriceBasedOnNetIncomePosition" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWithAntidilutiveEffectWeightedAverageExercisePriceBasedOnNetIncomePosition" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration"/> |
| <xsd:element id="iknx_TaxExemptIndustrialRevenueBondsAmountSoldToBank" name="TaxExemptIndustrialRevenueBondsAmountSoldToBank" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/> |
| <xsd:element abstract="true" id="iknx_The1995IncentiveStockOptionPlanMember" name="The1995IncentiveStockOptionPlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="iknx_The2019EquityIncentivePlanMember" name="The2019EquityIncentivePlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration"/> |
| <xsd:element id="iknx_Vehicles" name="Vehicles" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/> |
| <xsd:element abstract="true" id="iknx_statement-statement-note-3-inventories-major-components-of-inventories-details" name="statement-statement-note-3-inventories-major-components-of-inventories-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="iknx_statement-statement-note-3-inventories-tables" name="statement-statement-note-3-inventories-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="iknx_statement-statement-note-4-earnings-per-common-share-eps-summary-of-calculation-of-diluted-eps-details" name="statement-statement-note-4-earnings-per-common-share-eps-summary-of-calculation-of-diluted-eps-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="iknx_statement-statement-note-4-earnings-per-common-share-eps-tables" name="statement-statement-note-4-earnings-per-common-share-eps-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="iknx_statement-statement-note-5-stockbased-compensation-assumptions-details" name="statement-statement-note-5-stockbased-compensation-assumptions-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="iknx_statement-statement-note-5-stockbased-compensation-stock-option-activity-details" name="statement-statement-note-5-stockbased-compensation-stock-option-activity-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="iknx_statement-statement-note-5-stockbased-compensation-tables" name="statement-statement-note-5-stockbased-compensation-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="iknx_statement-statement-note-6-segment-information-reportable-segments-details" name="statement-statement-note-6-segment-information-reportable-segments-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/> |
| <xsd:element abstract="true" id="iknx_statement-statement-note-6-segment-information-tables" name="statement-statement-note-6-segment-information-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/> |
| </xsd:schema> |