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

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- 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. + Details
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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 17 -Article 5 + Details
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- Definition 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). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 17 -Article 5 + Details
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