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

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