Unrecognized compensation weighted average period.

No definition available.

Name:	KOPN_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognitionDescription
Namespace Prefix:	KOPN_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Total fair value awards.

+ References

No definition available.

+ Details

Name:	KOPN_FairValueAwards
Namespace Prefix:	KOPN_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Grant expiration date.

+ References

No definition available.

+ Details

Name:	KOPN_GrantExpirationDate
Namespace Prefix:	KOPN_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Gross proceeds from registered sale equity securities.

+ References

No definition available.

+ Details

Name:	KOPN_GrossProceedsFromRegisteredSaleEquitySecurities
Namespace Prefix:	KOPN_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Percentage of common stock outstanding.

+ References

No definition available.

+ Details

Name:	KOPN_PercentageOfCommonStockSharesOutstanding
Namespace Prefix:	KOPN_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Underwriting discounts and offering expenses from sale of equity.

+ References

No definition available.

+ Details

Name:	KOPN_UnderwritingDiscountsAndOfferingExpensesfromSaleofEquity
Namespace Prefix:	KOPN_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

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

- Definition

The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Per share or per unit amount of equity securities issued.

+ References

No definition available.

+ Details

Name:	us-gaap_SharesIssuedPricePerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_TypeOfArrangementAxis=KOPN_EmploymentAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_TitleOfIndividualAxis=KOPN_DrJohnFanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=KOPN_PriceEqualToOrGreaterThanFivePointTwoFiveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=KOPN_PriceEqualToOrGreaterThanSixPointZeroMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=KOPN_PriceEqualToOrGreaterThanSevenPointZeroMember
Namespace Prefix:
Data Type:	na
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STOCKHOLDERS’ EQUITY AND STOCK-BASED COMPENSATION (Details Narrative) - USD ($) $ / shares in Units, $ in Millions				9 Months Ended
	Apr. 10, 2019	Mar. 15, 2019	Dec. 31, 2017	Sep. 26, 2020
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Sale of Stock, Number of Shares Issued in Transaction	700,000	7,300,000
Gross proceeds from registered sale equity securities	$ 8.8
Shares Issued, Price Per Share		$ 1.10
Underwriting discounts and offering expenses from sale of equity	$ 0.7
Percentage of common stock outstanding	0.80%	8.90%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period				628,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount				$ 0.6
Unrecognized compensation weighted average period				two years.
Employment Agreement [Member] \| Dr. John Fan [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
[custom:GrantExpirationDate]			Dec. 31, 2020
Total fair value awards			$ 1.7
Employment Agreement [Member] \| Dr. John Fan [Member] \| Price Equal to or Greater Than $5.25 [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period			640,000
Employment Agreement [Member] \| Dr. John Fan [Member] \| Price Equal to or Greater Than $6.00 [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period			150,000
Employment Agreement [Member] \| Dr. John Fan [Member] \| Price Equal to or Greater Than $7.00 [Member]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period			150,000