XML 19 R55.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Employee Benefit Plan (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 27, 2014 | Dec. 28, 2013 | Dec. 29, 2012
Schedule of Benefit Plans Disclosure [Line Items] |  |  |
Employee age threshhold for higher annual contribution | 50 years |  |
Employer matching percentage | 50.00%us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent |  |
Maximum amount of employee contribution that employer matches | 6.00%us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent |  |
Amount charged to operations in connection with the plan | $ 224,000 us-gaap_DefinedContributionPlanCostRecognized | $ 146,000 us-gaap_DefinedContributionPlanCostRecognized | $ 210,000 us-gaap_DefinedContributionPlanCostRecognized
Under the age of 50 |  |  |
Schedule of Benefit Plans Disclosure [Line Items] |  |  |
Maximum amount of annual compensation that can be deferred | 17,500 us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeeAmount / kopn_AgeLimitAxis = kopn_UnderAgeFiftyMember |  |
Over the age fo 50 |  |  |
Schedule of Benefit Plans Disclosure [Line Items] |  |  |
Maximum amount of annual compensation that can be deferred | $ 23,000 us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeeAmount / kopn_AgeLimitAxis = kopn_OverAgeFiftyMember |  |

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
- Details
Name: | kopn_ScheduleOfBenefitPlansDisclosureLineItems
Namespace Prefix: | kopn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&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_OverAgeFiftyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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