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Other Assets and Amounts Due to / Due From Affiliates (Other Assets) (Details) (USD $)	Dec. 27, 2014	Dec. 28, 2013	Jan. 16, 2013
Schedule of Other Assets, Including Investments in Affiliates [Line Items]
Other	$ 219,704us-gaap_OtherAssetsMiscellaneous	$ 169,764us-gaap_OtherAssetsMiscellaneous
Other assets	1,900,828us-gaap_OtherAssetsNoncurrent	3,024,458us-gaap_OtherAssetsNoncurrent
Available-for-sale Securities, Fair Value Disclosure	76,223,135us-gaap_AvailableForSaleSecurities
Notes, Loans and Financing Receivable, Gross, Noncurrent			15,000,000us-gaap_NotesAndLoansReceivableGrossNoncurrent
KoBrite
Schedule of Other Assets, Including Investments in Affiliates [Line Items]
Non-Marketable Securities - Equity Method Investments		1,421,592us-gaap_EquityMethodInvestments / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = kopn_KoBriteMember
Vuzix
Schedule of Other Assets, Including Investments in Affiliates [Line Items]
Marketable Securities, Equity Securities	1,500,777us-gaap_MarketableSecuritiesEquitySecurities / invest_InvestmentIssuerAxis = kopn_VuzixMember	1,433,102us-gaap_MarketableSecuritiesEquitySecurities / invest_InvestmentIssuerAxis = kopn_VuzixMember
Available-for-sale Securities, Fair Value Disclosure	1,500,000us-gaap_AvailableForSaleSecurities / invest_InvestmentIssuerAxis = kopn_VuzixMember
Available-for-sale Equity Securities, Amortized Cost Basis		0us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis / invest_InvestmentIssuerAxis = kopn_VuzixMember
GCS Holdings
Schedule of Other Assets, Including Investments in Affiliates [Line Items]
Marketable Securities, Equity Securities	180,347us-gaap_MarketableSecuritiesEquitySecurities / invest_InvestmentIssuerAxis = kopn_GCSHoldingsMember	0us-gaap_MarketableSecuritiesEquitySecurities / invest_InvestmentIssuerAxis = kopn_GCSHoldingsMember
Available-for-sale Securities, Fair Value Disclosure	$ 200,000us-gaap_AvailableForSaleSecurities / invest_InvestmentIssuerAxis = kopn_GCSHoldingsMember

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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.

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

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 25

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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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-Topic 210

-SubTopic 10

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For an unclassified balance sheet, this item represents investments in common and preferred stocks and other forms of securities that provide ownership interests in a corporation.

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An amount representing an agreement for an unconditional promise by the maker to pay the Entity (holder) a definite sum of money at a future date(s) more than one year from the balance sheet date. Such amount may include accrued interest receivable in accordance with the terms of the debt. The debt also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale.

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Amount of other miscellaneous assets.

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Aggregate carrying amount, as of the balance sheet date, of noncurrent assets not separately disclosed in the balance sheet. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer).

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