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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (USD $)	3 Months Ended
	Mar. 28, 2015	Mar. 29, 2014
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (3,813,086)us-gaap_ProfitLoss	$ (9,093,319)us-gaap_ProfitLoss
Foreign currency translation adjustments	14,422kopn_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentsBeforeTax	(859,599)kopn_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentsBeforeTax
Holding (loss) gain on marketable securities	824,922us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	183,441us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax
Reclassifications of gains in net (loss) income	(377,561)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	(14,085)us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax
Other Comprehensive Income (Loss), Net of Tax	461,783us-gaap_OtherComprehensiveIncomeLossNetOfTax	(690,243)us-gaap_OtherComprehensiveIncomeLossNetOfTax
Comprehensive (loss) income	(3,351,303)us-gaap_ComprehensiveIncomeNetOfTax	(9,783,562)us-gaap_ComprehensiveIncomeNetOfTax
Comprehensive loss (income) attributable to the noncontrolling interest	57,798us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	8,986us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest
Comprehensive (loss) income attributable to controlling interest	$ (3,293,505)us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	$ (9,774,576)us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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