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Goodwill and Intangibles (Details) (USD $)	12 Months Ended			3 Months Ended
	Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012	Dec. 28, 2013
Schedule of Finite-Lived Intangible Assets and Goodwill [Line Items]
Other Intangible Assets, Net	$ 616,759us-gaap_OtherIntangibleAssetsNet
Goodwill [Roll Forward]
Beginning Balance	1,016,132us-gaap_Goodwill	684,789us-gaap_Goodwill
Additions		395,713us-gaap_GoodwillAcquiredDuringPeriod
Disposals	(39,681)us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit	(64,370)us-gaap_GoodwillWrittenOffRelatedToSaleOfBusinessUnit
Ending Balance	976,451us-gaap_Goodwill	1,016,132us-gaap_Goodwill	684,789us-gaap_Goodwill	1,016,132us-gaap_Goodwill
Amortization of intangible assets due in next twelve months	1,000,000us-gaap_AmortizationOfIntangibleAssets	300,000us-gaap_AmortizationOfIntangibleAssets	300,000us-gaap_AmortizationOfIntangibleAssets
Customer relationships
Goodwill [Roll Forward]
Useful life of identifiable intangible assets	7 years
Developed technology
Goodwill [Roll Forward]
Useful life of identifiable intangible assets	7 years
Trademark portfolio
Goodwill [Roll Forward]
Useful life of identifiable intangible assets	7 years
FDD
Schedule of Finite-Lived Intangible Assets and Goodwill [Line Items]
Impairment of Intangible Assets (Excluding Goodwill)				1,200,000us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_BusinessAcquisitionAxis = kopn_ForthDimensionDisplaysLimitedMember
Goodwill [Roll Forward]
Goodwill impairment charge	1,700,000us-gaap_GoodwillImpairmentLoss / us-gaap_BusinessAcquisitionAxis = kopn_ForthDimensionDisplaysLimitedMember
Intoware
Schedule of Finite-Lived Intangible Assets and Goodwill [Line Items]
Impairment of Intangible Assets (Excluding Goodwill)				$ 300,000us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill / us-gaap_BusinessAcquisitionAxis = kopn_IkanosMember

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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