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Note 18 - Employee Benefits (Details Textual) - The Plan [Member] - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Defined Contribution Plan, Cost | $ 48,549 | $ 55,989 | $ 141,349 | $ 159,504
Pension Plan [Member] |  |  |  |
Defined Contribution Plan, Requisite Service Period (Month) |  |  | 1 month |
Pension Plan [Member] | Maximum [Member] |  |  |  |
Defined Contribution Plan, Employer Matching Contribution, Percent of Match |  |  | 100.00% |
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay |  |  | 3.00% |
Pension Plan [Member] | Minimum [Member] |  |  |  |
Defined Contribution Plan, Employer Matching Contribution, Percent of Match |  |  | 50.00% |
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay |  |  | 2.00% |

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- Definition Represent the requisite service period of defined contribution plan. + References No definition available. + Details
Name: | iccc_DefinedContributionPlanRequisiteServicePeriod
Namespace Prefix: | iccc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 70 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480794/715-70-50-1 + Details
Name: | us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_RetirementPlanNameAxis=iccc_ThePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_PensionPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |