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Accrued Warranty - Additional Information (Detail) | 6 Months Ended
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Jun. 30, 2012
Class of Warrant or Right [Line Items] |
Product warranty, standard term (in months) | 12 months

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- Definition Product Warranty Term + References No definition available. + Details
Name: | kopn_ProductWarrantyTerm
Namespace Prefix: | kopn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_ClassOfWarrantOrRightLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration