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INCOME TAXES (Details) (USD $) | 3 Months Ended
--- | ---
Mar. 28, 2015 | Mar. 29, 2014 | Mar. 30, 2013
Income Taxes [Line Items] |  |  |
State income and foreign tax expenses | $ 12,500 us-gaap_IncomeTaxExpenseBenefit | $ (143,000)us-gaap_IncomeTaxExpenseBenefit | $ 143,000 us-gaap_IncomeTaxExpenseBenefit
Net operating loss carryforwards available for tax purposes | 71,000,000 us-gaap_OperatingLossCarryforwards |  |
Unrecorded benefits from stock award | $ 10,000,000 kopn_UnrecognizedExcessTaxBenefitsFromStockBasedCompensation |  |
Minimum |  |  |
Income Taxes [Line Items] |  |  |
State income tax returns examination period | 3 years |  |
Maximum |  |  |
Income Taxes [Line Items] |  |  |
State income tax returns examination period | 5 years |  |
The state impact of any federal changes, subject to examination by various states (in years) | 1 year |  |

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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Income Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6515339 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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