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v3.25.1

Schedule of Pre Funded Warrants Activity (Details) - Prefunded Warrants [Member] - shares | 12 Months Ended
--- | ---
Dec. 28, 2024 | Dec. 30, 2023
Class of Warrant or Right [Line Items] |  |
Beginning balance | 6,000,000 |
Issuance of pre-funded warrants | 4,000,000 | 6,000,000
Ending balance | 10,000,000 | 6,000,000

X
- Definition Class of warrant or right issuance pre funded warrants + References No definition available. + Details
Name: | KOPN_ClassOfWarrantOrRightIssuancePreFundedWarrants
Namespace Prefix: | KOPN_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition 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. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of warrants or rights outstanding. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=KOPN_PrefundedWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |