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Contract Assets and Liabilities (Details Narrative) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 30, 2023 | Dec. 31, 2022 | Dec. 25, 2021
Contract Assets And Liabilities |  |  |
[custom:NetContractAssets-0] | $ 0.7 |  |
Contract with customer, liability, revenue recognized | $ 0.9 | $ 3.7 | $ 1.5

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- References No definition available. + Details
Name: | KOPN_DisclosureContractAssetsAndLiabilitiesAbstract
Namespace Prefix: | KOPN_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Net contract assets. + References No definition available. + Details
Name: | KOPN_NetContractAssets
Namespace Prefix: | KOPN_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-8 + Details
Name: | us-gaap_ContractWithCustomerLiabilityRevenueRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration