Contract Assets and Liabilities (Details) - USD ($)	12 Months Ended
Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2017
Contract Assets and Liabilities [Abstract]
Contract with Customer, Asset, Net	$ 3,089,663	$ 704,863	$ 3,555,137
Contract with Customer, Liability, Current	(388,933)		(664,146)
Contract Liability, Net, Noncurrent	(17,294)	(374,171)	(374,171)
Contract Assets (Liabilities), Net	2,683,436		$ 2,516,820
Change in Contract Assets	$ (465,474)
Change in Contract Asset Percent Change	(13.00%)
Change in Contract Liabilities	$ 275,213
Change in Contract Liability Percent Change	(41.00%)
Change in Contract Liabilities-Noncurrent	$ 356,877
Percent Change in Contract Liabilities-Noncurrent	(95.00%)
Change in Contract Assets (Liabilities), Net	$ 166,616
Change in Contract Assets (Liabilities) Net Percent Change	7.00%
Contract with Customer, Liability, Revenue Recognized	$ 300,000	$ 400,000

Change in Contract Asset Percent Change

No definition available.

Name:	kopn_ChangeinContractAssetPercentChange
Namespace Prefix:	kopn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Change in Contract Assets

+ References

No definition available.

+ Details

Name:	kopn_ChangeinContractAssets
Namespace Prefix:	kopn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Change in Contract Assets (Liabilities), Net

+ References

No definition available.

+ Details

Name:	kopn_ChangeinContractAssetsLiabilitiesNet
Namespace Prefix:	kopn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Change in Contract Assets (Liabilities) Net Percent Change

+ References

No definition available.

+ Details

Name:	kopn_ChangeinContractAssetsLiabilitiesNetPercentChange
Namespace Prefix:	kopn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Change in Contract Liabilities

+ References

No definition available.

+ Details

Name:	kopn_ChangeinContractLiabilities
Namespace Prefix:	kopn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Change in Contract Liabilities-Noncurrent

+ References

No definition available.

+ Details

Name:	kopn_ChangeinContractLiabilitiesNoncurrent
Namespace Prefix:	kopn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Change in Contract Liability Percent Change

+ References

No definition available.

+ Details

Name:	kopn_ChangeinContractLiabilityPercentChange
Namespace Prefix:	kopn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Net total of contract assets and liabilities.

+ References

No definition available.

+ Details

Name:	kopn_ContractAssetsLiabilitiesNet
Namespace Prefix:	kopn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Contract Assets and Liabilities [Abstract]

+ References

No definition available.

+ Details

Name:	kopn_ContractAssetsandLiabilitiesAbstract
Namespace Prefix:	kopn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percent Change in Contract Liabilities-Noncurrent

+ References

No definition available.

+ Details

Name:	kopn_PercentChangeinContractLiabilitiesNoncurrent
Namespace Prefix:	kopn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130531-203044

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130533-203044

+ Details

Name:	us-gaap_ContractWithCustomerAssetNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130532-203044

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130531-203044

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045

+ Details

Name:	us-gaap_ContractWithCustomerLiabilityCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as noncurrent.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130532-203044

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130531-203044

+ Details

Name:	us-gaap_ContractWithCustomerLiabilityNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

+ Details

Name:	us-gaap_ContractWithCustomerLiabilityRevenueRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration