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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: