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Contract Assets and Liabilities (Details Narrative) - USD ($) | 12 Months Ended
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Dec. 31, 2022 | Dec. 25, 2021 | Dec. 26, 2020
Contract Assets And Liabilities |  |  |
Change in Net contract assets | $ 4,915,977 |  |
Contract with customer, liability, revenue recognized | $ 3,700,000 | $ 1,500,000 | $ 600,000

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- Definition Contract with customer assets liability cumulative catchup adjustment to revenue modification of contract. + References No definition available. + Details
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Namespace Prefix: | KOPN_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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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 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 -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130549-203045 + Details
Name: | us-gaap_ContractWithCustomerLiabilityRevenueRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration