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ACCRUED WARRANTY (Details) (USD $)	3 Months Ended
	Mar. 28, 2015
Product Warranties Disclosures [Abstract]
Product warranty term	12 months
Movement in Standard Product Warranty Accrual [Roll Forward]
Beginning Balance	$ 716,000us-gaap_StandardProductWarrantyAccrual
Additions	128,000us-gaap_StandardProductWarrantyAccrualCurrent
Claim and reversals	(128,000)kopn_StandardProductWarrantyAccrualPaymentsCurrent
Ending Balance	$ 716,000us-gaap_StandardProductWarrantyAccrual

X

- Definition

Product Warranty Term

+ References

No definition available.

+ Details

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X

- Definition

Standard Product Warranty Accrual, Payments, Current

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Details

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Namespace Prefix:	us-gaap_
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X

- Definition

Amount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended product warranty liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 8

-Subparagraph (c)(1),(c)(5)

-URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249

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X

- Definition

Amount as of the balance sheet date of the aggregate standard product warranty liability that is expected to be paid within one year or the normal operating cycle, if longer. Does not include the balance for the extended product warranty liability.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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