XML 77 R58.htm IDEA: XBRL DOCUMENT
v3.19.3

Employee Benefit Plan (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 29, 2018 | Dec. 30, 2017 | Dec. 31, 2016
Schedule of Benefit Plans Disclosure [Line Items] |  |  |
Defined Contribution Plan, Employee Age Threshhold for Higher Annual Contribution | 50 years |  |
Employer matching percentage | 50.00% |  |
Maximum amount of employee contribution that employer matches | 6.00% |  |
Amount charged to operations in connection with the plan | $ 300,000 | $ 300,000 | $ 300,000
Under the age of 50 |  |  |
Schedule of Benefit Plans Disclosure [Line Items] |  |  |
Maximum amount of annual compensation that can be deferred | 18,500 |  |
Over the age fo 50 |  |  |
Schedule of Benefit Plans Disclosure [Line Items] |  |  |
Maximum amount of annual compensation that can be deferred | $ 24,500 |  |

X
- Definition Defined Contribution Plan, Employee Age Threshhold for Higher Annual Contribution + References No definition available. + Details
Name: | kopn_DefinedContributionPlanEmployeeAgeThreshholdForHigherAnnualContribution
Namespace Prefix: | kopn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition [Line Items] for Schedule of Benefit Plans Disclosure [Table] + References No definition available. + Details
Name: | kopn_ScheduleOfBenefitPlansDisclosureLineItems
Namespace Prefix: | kopn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of cost for defined contribution plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
Name: | us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum amount the employee may contribute to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeeAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | kopn_AgeLimitAxis=kopn_UnderAgeFiftyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | kopn_AgeLimitAxis=kopn_OverAgeFiftyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |