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v3.20.4

Schedule of Satisfaction of Performance Obligations (Details) | 12 Months Ended
--- | ---
Dec. 26, 2020 | Dec. 28, 2019 | Dec. 29, 2018
Transferred at Point in Time [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue percentage from products and services transferred customers | 34.00% | 64.00% | 60.00%
Transferred over Time [Member] |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue percentage from products and services transferred customers | 66.00% | 36.00% | 40.00%

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- Definition Revenue percentage from products and services transferred customers. + References No definition available. + Details
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Namespace Prefix: | KOPN_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- 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
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_TimingOfTransferOfGoodOrServiceAxis=us-gaap_TransferredOverTimeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |