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OTHER ASSETS AND AMOUNTS DUE TO / FROM AFFILIATES (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 28, 2015	Mar. 29, 2014	Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012	Jan. 16, 2013
Schedule of Equity Method Investments [Line Items]
Accounts and Notes Receivable, Net						$ 14,900,000us-gaap_NotesAndLoansReceivableGrossNoncurrent
Available-for-sale Securities	74,685,260us-gaap_AvailableForSaleSecurities
Class of Warrant or Right, Unissued	251,000us-gaap_ClassOfWarrantOrRightUnissued
Warrants and Rights Outstanding	352,000us-gaap_WarrantsAndRightsOutstanding
Prior Period Reclassification Adjustment	1,300,000us-gaap_PriorPeriodReclassificationAdjustment		171,000us-gaap_PriorPeriodReclassificationAdjustment	646,000us-gaap_PriorPeriodReclassificationAdjustment	817,000us-gaap_PriorPeriodReclassificationAdjustment
Net (loss) income	(3,813,086)us-gaap_ProfitLoss	(9,093,319)us-gaap_ProfitLoss	28,700,000us-gaap_ProfitLoss	35,900,000us-gaap_ProfitLoss
Ko Brite (Member)
Schedule of Equity Method Investments [Line Items]
Carrying value of the investment	1,300,000us-gaap_EquityMethodInvestments / us-gaap_DebtSecurityAxis = kopn_KoBriteMember
Company's ownership percentage	12.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_DebtSecurityAxis = kopn_KoBriteMember
Vuzix [Member]
Schedule of Equity Method Investments [Line Items]
Available-for-sale Securities	1,900,000us-gaap_AvailableForSaleSecurities / invest_InvestmentIssuerAxis = kopn_VuzixMember		1,500,000us-gaap_AvailableForSaleSecurities / invest_InvestmentIssuerAxis = kopn_VuzixMember
Available-for-sale Equity Securities, Amortized Cost Basis	300,000us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis / invest_InvestmentIssuerAxis = kopn_VuzixMember		0us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis / invest_InvestmentIssuerAxis = kopn_VuzixMember
GCS Holdings [Member]
Schedule of Equity Method Investments [Line Items]
Available-for-sale Securities	200,000us-gaap_AvailableForSaleSecurities / invest_InvestmentIssuerAxis = kopn_GCSHoldingsMember		200,000us-gaap_AvailableForSaleSecurities / invest_InvestmentIssuerAxis = kopn_GCSHoldingsMember
Available-for-sale Equity Securities, Amortized Cost Basis	$ 0us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis / invest_InvestmentIssuerAxis = kopn_GCSHoldingsMember		$ 0us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis / invest_InvestmentIssuerAxis = kopn_GCSHoldingsMember

X

- Definition

This item represents the cost of equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments for other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

No definition available.

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

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The number of warrants or rights which entitle the entity to receive future services in exchange for the unvested, forfeitable warrants or rights.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price.

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