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Income Taxes (Details) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 14, 2013 | Dec. 27, 2014 | Dec. 28, 2013 | Dec. 29, 2012
Current: |  |  |  |
Federal |  | $ 0 us-gaap_CurrentFederalTaxExpenseBenefit | $ (13,124,000)us-gaap_CurrentFederalTaxExpenseBenefit | $ 0 us-gaap_CurrentFederalTaxExpenseBenefit
State |  | 50,000 us-gaap_CurrentStateAndLocalTaxExpenseBenefit | 12,000 us-gaap_CurrentStateAndLocalTaxExpenseBenefit | 64,000 us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Foreign | 1,300,000 us-gaap_CurrentForeignTaxExpenseBenefit | 0 us-gaap_CurrentForeignTaxExpenseBenefit | (34,000)us-gaap_CurrentForeignTaxExpenseBenefit | 0 us-gaap_CurrentForeignTaxExpenseBenefit
Total current provision |  | 50,000 us-gaap_CurrentIncomeTaxExpenseBenefit | (13,146,000)us-gaap_CurrentIncomeTaxExpenseBenefit | 64,000 us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred: |  |  |  |
Federal |  | (9,554,000)us-gaap_DeferredFederalIncomeTaxExpenseBenefit | (3,616,000)us-gaap_DeferredFederalIncomeTaxExpenseBenefit | (2,878,000)us-gaap_DeferredFederalIncomeTaxExpenseBenefit
State |  | (1,709,000)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit | 644,000 us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit | (505,000)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
Foreign |  | 411,000 us-gaap_DeferredForeignIncomeTaxExpenseBenefit | (565,000)us-gaap_DeferredForeignIncomeTaxExpenseBenefit | 73,000 us-gaap_DeferredForeignIncomeTaxExpenseBenefit
Change in valuation allowance |  | 10,622,000 us-gaap_DeferredOtherTaxExpenseBenefit | 3,750,000 us-gaap_DeferredOtherTaxExpenseBenefit | 4,345,000 us-gaap_DeferredOtherTaxExpenseBenefit
Total deferred provision |  | (230,000)us-gaap_DeferredIncomeTaxExpenseBenefit | 213,000 us-gaap_DeferredIncomeTaxExpenseBenefit | 1,035,000 us-gaap_DeferredIncomeTaxExpenseBenefit
Total (benefit) provision for income taxes |  | (180,000)us-gaap_IncomeTaxExpenseBenefit | (12,933,209)us-gaap_IncomeTaxExpenseBenefit | 1,099,000 us-gaap_IncomeTaxExpenseBenefit
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract] |  |  |  |
Tax provision at federal statutory rates |  | (9,964,000)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | (13,322,000)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | (7,002,000)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
State tax liability |  | 33,000 us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes | 8,000 us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes | 42,000 us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes
Foreign deferred |  | 371,000 us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential | (644,000)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential | 734,000 us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential
Foreign withholding |  | (196,000)us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings | 308,000 us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings | 1,170,000 us-gaap_IncomeTaxReconciliationRepatriationOfForeignEarnings
Outside basis in KTC and Kowon, net |  | (394,000)kopn_IncomeTaxReconciliationOutsideBasisInSubsidiary | (202,000)kopn_IncomeTaxReconciliationOutsideBasisInSubsidiary | 2,422,000 kopn_IncomeTaxReconciliationOutsideBasisInSubsidiary
Goodwill |  | 0 us-gaap_IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses | 0 us-gaap_IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses | 417,000 us-gaap_IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses
Non-deductible expenses |  | (21,000)us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther | 306,000 us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther | (18,000)us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther
Increase in net state operating loss carryforwards |  | (177,000)kopn_IncomeTaxReconciliationChangeInStateNetOperatingLossCarryforwards | (2,868,000)kopn_IncomeTaxReconciliationChangeInStateNetOperatingLossCarryforwards | 0 kopn_IncomeTaxReconciliationChangeInStateNetOperatingLossCarryforwards
Utilization of NOL for R&D refund |  | 1,089,000 kopn_UtilizationofNOLforRDrefund | 0 kopn_UtilizationofNOLforRDrefund | 0 kopn_UtilizationofNOLforRDrefund
Provision to tax return adjustments and state tax rate change |  | (516,000)kopn_EffectiveIncomeTaxReconciliationChangeInEnactedTaxRateAndPriorYearIncomeTaxes | (33,000)kopn_EffectiveIncomeTaxReconciliationChangeInEnactedTaxRateAndPriorYearIncomeTaxes | (462,000)kopn_EffectiveIncomeTaxReconciliationChangeInEnactedTaxRateAndPriorYearIncomeTaxes
Tax credits |  | (610,000)us-gaap_IncomeTaxReconciliationTaxCredits | (390,000)us-gaap_IncomeTaxReconciliationTaxCredits | (100,000)us-gaap_IncomeTaxReconciliationTaxCredits
Effective Income Tax Rate Reconciliation, Deduction, Amount |  | 196,000 kopn_EffectiveIncomeTaxRateReconcilationNondeductibleExpenses162Mcompensationlimitation | 558,000 kopn_EffectiveIncomeTaxRateReconcilationNondeductibleExpenses162Mcompensationlimitation | 198,000 kopn_EffectiveIncomeTaxRateReconcilationNondeductibleExpenses162Mcompensationlimitation
Non-deductible equity compensation |  | (687,000)us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost | (418,000)us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost | 136,000 us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost
Other, net |  | 74,000 us-gaap_IncomeTaxReconciliationOtherAdjustments | 14,000 us-gaap_IncomeTaxReconciliationOtherAdjustments | (783,000)us-gaap_IncomeTaxReconciliationOtherAdjustments
Change in valuation allowance |  | 10,622,000 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | 3,750,000 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | 4,345,000 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Total (benefit) provision for income taxes |  | (180,000)us-gaap_IncomeTaxExpenseBenefit | (12,933,209)us-gaap_IncomeTaxExpenseBenefit | 1,099,000 us-gaap_IncomeTaxExpenseBenefit
Pretax foreign (losses) earnings |  | (2,588,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign | (4,966,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign | (6,870,000)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign
Deferred tax liability: |  |  |  |
Intangible asset |  | 0 us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets | (141,000)us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets |
Foreign withholding liability |  | (1,282,000)kopn_DeferredTaxLiabilitiesForeignTaxes | (1,478,000)kopn_DeferredTaxLiabilitiesForeignTaxes |
Foreign unremitted earnings |  | (2,882,000)us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings | (3,276,000)us-gaap_DeferredTaxLiabilitiesUndistributedForeignEarnings |
Deferred Tax assets: |  |  |  |
Federal net operating loss carryforwards |  | 22,758,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic | 15,322,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic |
State net operating loss carryforwards |  | 1,689,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal | 624,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal |
Foreign net operating loss carryforwards |  | 2,612,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign | 3,202,000 us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign |
Equity awards |  | 2,508,000 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost | 1,666,000 us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost |
Tax credits |  | 6,267,000 us-gaap_DeferredTaxAssetsTaxCreditCarryforwards | 5,657,000 us-gaap_DeferredTaxAssetsTaxCreditCarryforwards |
Equipment |  | 1,024,000 us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment | 838,000 us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment |
Investments |  | 5,279,000 us-gaap_DeferredTaxAssetsInvestments | 4,594,000 us-gaap_DeferredTaxAssetsInvestments |
Other |  | 3,253,000 us-gaap_DeferredTaxAssetsOther | 3,365,000 us-gaap_DeferredTaxAssetsOther |
Net deferred tax assets |  | 41,226,000 kopn_DeferredTaxAssetsLiabilitiesNetBeforeValuationAllowance | 30,373,000 kopn_DeferredTaxAssetsLiabilitiesNetBeforeValuationAllowance |
Valuation allowance |  | (42,508,000)us-gaap_DeferredTaxAssetsValuationAllowance | (31,886,000)us-gaap_DeferredTaxAssetsValuationAllowance |
Net deferred tax assets after deducting valuation allowance |  | (1,282,000)us-gaap_DeferredTaxAssetsLiabilitiesNet | (1,513,000)us-gaap_DeferredTaxAssetsLiabilitiesNet |
Increase (decrease) in valuation allowance |  | 10,600,000 us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount |  |
Unrecorded benefits from stock award |  | 10,300,000 kopn_UnrecognizedExcessTaxBenefitsFromStockBasedCompensation |  |
Deferred Tax Liabilities, Parent's Basis in Discontinued Operation |  | 2,900,000 us-gaap_DeferredTaxLiabilitiesParentsBasisInDiscontinuedOperation |  |
Income Tax Expense (Benefit) |  | (180,000)us-gaap_IncomeTaxExpenseBenefit | (12,933,209)us-gaap_IncomeTaxExpenseBenefit | 1,099,000 us-gaap_IncomeTaxExpenseBenefit
Maximum |  |  |  |
Deferred Tax assets: |  |  |  |
The state impact of any federal changes, subject to examination by various states (in years) |  | 1 year |  |
Segments excluding KTC |  |  |  |
Deferred Tax assets: |  |  |  |
Increase (decrease) in valuation allowance |  |  | 3,700,000 us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount / us-gaap_StatementBusinessSegmentsAxis = kopn_SegmentsExcludingKopinTaiwanCorporationMember |
Utiilzation of operating loss carryforwards |  |  | 8,600,000 kopn_UtiilzationOfOperatingLossCarryforwards / us-gaap_StatementBusinessSegmentsAxis = kopn_SegmentsExcludingKopinTaiwanCorporationMember |
International jurisdictions | Minimum |  |  |  |
Deferred Tax assets: |  |  |  |
Income tax returns examination period |  | 3 years |  |
International jurisdictions | Maximum |  |  |  |
Deferred Tax assets: |  |  |  |
Income tax returns examination period |  | 7 years |  |
Federal |  |  |  |
Deferred Tax assets: |  |  |  |
Net operating loss carryforwards available for tax purposes |  | $ 65,000,000 us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_InternalRevenueServiceIRSMember |  |
State | Minimum |  |  |  |
Deferred Tax assets: |  |  |  |
Income tax returns examination period |  | 3 years |  |
State | Maximum |  |  |  |
Deferred Tax assets: |  |  |  |
Income tax returns examination period |  | 5 years |  |

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