v3.26.1

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Jun. 27, 2026
Paul C. Baker [Member]
Trading Arrangements, by Individual [Table]
Name	Paul C. Baker

X

- References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-K
-Number 229
-Section 408
-Subsection a
-Paragraph 2
-Subparagraph A

+ Details

Name:	ecd_TradingArrByIndTable
Namespace Prefix:	ecd_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-K
-Number 229
-Section 408
-Subsection a
-Paragraph 2
-Subparagraph A

+ Details

Name:	ecd_TrdArrIndName
Namespace Prefix:	ecd_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ecd_IndividualAxis=KOPN_PaulCBakerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: