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Discontinued Operations (Details) (USD $) | 12 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Dec. 27, 2014 | Dec. 28, 2013 | Dec. 29, 2012 | Mar. 30, 2013 | Jan. 16, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Business Acquisition, Cost of Acquired Entity, Purchase Price |  |  |  |  | $ 70,200,000 kopn_DisposalGroupIncludingDiscontinuedOperationAggregatePurchasePriceNetofAdjustments
Accounts and Notes Receivable, Net | 14,933,335 us-gaap_AccountsAndNotesReceivableNet | 14,866,666 us-gaap_AccountsAndNotesReceivableNet |  |  | 14,800,000 us-gaap_AccountsAndNotesReceivableNet
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract] |  |  |  |  |
Income from discontinued operations, net of tax | 0 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | 20,147,532 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax | 2,789,048 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax |  |
III-V product line including all outstanding equity interest in KTC Wireless, LLC |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |
Aggregate purchase price |  |  |  |  | 75,000,000 kopn_DisposalGroupIncludingDiscontinuedOperationAggregatePurchasePrice / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = kopn_IiiVProductLineIncludingAllOutstandingEquityInterestInKtcWirelessLlcMember
Proceeds received from divestiture |  |  |  | 55,200,000 us-gaap_ProceedsFromDivestitureOfBusinesses / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = kopn_IiiVProductLineIncludingAllOutstandingEquityInterestInKtcWirelessLlcMember |
Consideration to be paid on the third anniversary of the Closing Date |  |  |  |  | 15,000,000 kopn_DisposalGroupIncludingDiscontinuedOperationFutureConsiderationReceivable / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = kopn_IiiVProductLineIncludingAllOutstandingEquityInterestInKtcWirelessLlcMember
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract] |  |  |  |  |
Net sales and other operating revenues |  | 2,300,000 us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = kopn_IiiVProductLineIncludingAllOutstandingEquityInterestInKtcWirelessLlcMember | 58,800,000 us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = kopn_IiiVProductLineIncludingAllOutstandingEquityInterestInKtcWirelessLlcMember |  |
Income from operations before income taxes |  | (200,000)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = kopn_IiiVProductLineIncludingAllOutstandingEquityInterestInKtcWirelessLlcMember | 4,500,000 us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = kopn_IiiVProductLineIncludingAllOutstandingEquityInterestInKtcWirelessLlcMember |  |
Provision for income taxes on operations |  | 0 us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = kopn_IiiVProductLineIncludingAllOutstandingEquityInterestInKtcWirelessLlcMember | (1,700,000)us-gaap_DiscontinuedOperationTaxEffectOfIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriod / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = kopn_IiiVProductLineIncludingAllOutstandingEquityInterestInKtcWirelessLlcMember |  |
Income from operations, net of tax |  | (200,000)us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = kopn_IiiVProductLineIncludingAllOutstandingEquityInterestInKtcWirelessLlcMember | 2,800,000 us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = kopn_IiiVProductLineIncludingAllOutstandingEquityInterestInKtcWirelessLlcMember |  |
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax |  | 20,400,000 us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = kopn_IiiVProductLineIncludingAllOutstandingEquityInterestInKtcWirelessLlcMember | 0 us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = kopn_IiiVProductLineIncludingAllOutstandingEquityInterestInKtcWirelessLlcMember |  |
Income from discontinued operations, net of tax |  | $ 20,200,000 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = kopn_IiiVProductLineIncludingAllOutstandingEquityInterestInKtcWirelessLlcMember | $ 2,800,000 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = kopn_IiiVProductLineIncludingAllOutstandingEquityInterestInKtcWirelessLlcMember |  |

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