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Contract Assets and Liabilities (Details Narrative) - USD ($)	12 Months Ended
	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

X

- Definition

Contract with customer assets liability cumulative catchup adjustment to revenue modification of contract.

+ References

No definition available.

+ Details

Name:	KOPN_ContractWithCustomerAssetsLiabilityCumulativeCatchUpAdjustmentToRevenueModificationOfContract
Namespace Prefix:	KOPN_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	KOPN_DisclosureContractAssetsAndLiabilitiesAbstract
Namespace Prefix:	KOPN_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- 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