XML 92 R76.htm IDEA: XBRL DOCUMENT
v3.20.4

Accrued Warranty (Details Narrative) | 12 Months Ended
--- | ---
Dec. 26, 2020
Warranty [Member] |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |
Product warranty term | The Company warrants its products against defect for 12 months, however, for certain products a customer may purchase an extended warranty.

X
- Definition Product warranty term. + References No definition available. + Details
Name: | KOPN_ProductWarrantyTerm
Namespace Prefix: | KOPN_
Data Type: | xbrli:stringItemType
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_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=KOPN_WarrantyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |