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FAIR VALUE MEASUREMENTS (Details) (USD $) | Mar. 28, 2015 | Dec. 27, 2014
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Level 1 |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | $ 33,664,825 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | $ 37,535,266 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Level 1 | Money Markets, Cash and Equivalents |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 12,460,936 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 14,635,802 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Level 1 | U.S. Government Securities |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 19,065,259 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 21,218,340 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Level 1 | Vuzix [Member] |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 1,908,957 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = kopn_VuzixMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 1,500,777 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = kopn_VuzixMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Level 1 | GCS [Member] |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 229,673 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = kopn_GCSMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member | 180,347 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = kopn_GCSMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel1Member
Level 2 |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 55,620,001 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | 55,004,795 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Level 2 | U.S. Government Securities |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 36,675,618 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | 36,478,802 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Level 2 | Corporate Debt |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 6,779,034 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = us-gaap_CorporateDebtSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | 5,970,983 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = us-gaap_CorporateDebtSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Level 2 | Certificates of Deposit |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 12,165,349 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = us-gaap_CertificatesOfDepositMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member | 12,555,010 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = us-gaap_CertificatesOfDepositMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Level 2 | Vuzix [Member] |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value |  | 0 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = kopn_VuzixMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel2Member
Level 3 |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 0 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member | 0 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Level 3 | Money Markets, Cash and Equivalents |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 0 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member | 0 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Level 3 | U.S. Government Securities |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 0 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member | 0 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Level 3 | Corporate Debt |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 0 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = us-gaap_CorporateDebtSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member | 0 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = us-gaap_CorporateDebtSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Level 3 | Certificates of Deposit |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 0 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = us-gaap_CertificatesOfDepositMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member | 0 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = us-gaap_CertificatesOfDepositMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Level 3 | Vuzix [Member] |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 0 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = kopn_VuzixMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member | 0 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = kopn_VuzixMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Level 3 | GCS [Member] |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 0 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = kopn_GCSMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member | 0 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = kopn_GCSMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Estimate of Fair Value |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 89,284,826 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember | 92,540,061 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember
Estimate of Fair Value | Money Markets, Cash and Equivalents |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 12,460,936 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember | 14,635,802 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = us-gaap_CashAndCashEquivalentsMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember
Estimate of Fair Value | U.S. Government Securities |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 55,740,877 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember | 57,697,142 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = us-gaap_USGovernmentAgenciesDebtSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember
Estimate of Fair Value | Corporate Debt |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 6,779,034 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = us-gaap_CorporateDebtSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember | 5,970,983 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = us-gaap_CorporateDebtSecuritiesMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember
Estimate of Fair Value | Certificates of Deposit |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 12,165,349 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = us-gaap_CertificatesOfDepositMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember | 12,555,010 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = us-gaap_CertificatesOfDepositMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember
Estimate of Fair Value | Vuzix [Member] |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 1,908,957 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = kopn_VuzixMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember | 1,500,777 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = kopn_VuzixMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember
Estimate of Fair Value | GCS [Member] |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | $ 229,673 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = kopn_GCSMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember | $ 180,347 us-gaap_FinancialInstrumentsOwnedAtFairValue / us-gaap_DebtSecurityAxis = kopn_GCSMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_EstimateOfFairValueFairValueDisclosureMember

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- Definition The aggregate fair value as of the balance sheet date of financial instruments and other positions owned by the entity including: (1) mortgages, mortgage-backed and asset backed securities; (2) US government and agency obligations; (3) state and municipal government obligations; (4) other sovereign government debt; (5) corporate obligations; (6) corporate equities; (7) principal investments; (8) derivative contracts; and (9) physical commodities. Includes both pledged and unpledged holdings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35711157&loc=d3e42546-110969 + Details
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