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Segments and Geographical Information (Details) (USD $)	3 Months Ended									12 Months Ended
	Dec. 27, 2014	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 28, 2013		Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
Segment Reporting Information [Line Items]
Revenues	$ 10,637,000us-gaap_Revenues	$ 9,532,000us-gaap_Revenues	$ 6,943,000us-gaap_Revenues	$ 4,695,000us-gaap_Revenues	$ 5,550,000us-gaap_Revenues		$ 4,950,000us-gaap_Revenues	$ 6,079,000us-gaap_Revenues	$ 6,319,000us-gaap_Revenues	$ 31,807,465us-gaap_Revenues	$ 22,897,709us-gaap_Revenues	$ 34,641,860us-gaap_Revenues
Net income (loss) income attributable to the controlling interest	(5,302,000)us-gaap_NetIncomeLoss	(4,469,000)us-gaap_NetIncomeLoss	(8,806,000)us-gaap_NetIncomeLoss	(9,134,000)us-gaap_NetIncomeLoss	(9,660,000)us-gaap_NetIncomeLoss	[1]	(8,771,000)us-gaap_NetIncomeLoss	(7,910,000)us-gaap_NetIncomeLoss	21,634,000us-gaap_NetIncomeLoss	(28,212,044)us-gaap_NetIncomeLoss	(4,709,616)us-gaap_NetIncomeLoss	(18,361,930)us-gaap_NetIncomeLoss
Total assets from continuing operations	122,941,414us-gaap_Assets				146,131,723us-gaap_Assets					122,941,414us-gaap_Assets	146,131,723us-gaap_Assets
Long lived assets	4,589,000us-gaap_NoncurrentAssets				6,035,000us-gaap_NoncurrentAssets					4,589,000us-gaap_NoncurrentAssets	6,035,000us-gaap_NoncurrentAssets
Continuing Operations
Segment Reporting Information [Line Items]
Net income (loss) income attributable to the controlling interest										(28,212,000)us-gaap_NetIncomeLoss / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember	(4,710,000)us-gaap_NetIncomeLoss / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember	(21,150,000)us-gaap_NetIncomeLoss / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Total assets from continuing operations	122,941,000us-gaap_Assets / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember				146,132,000us-gaap_Assets / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember					122,941,000us-gaap_Assets / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember	146,132,000us-gaap_Assets / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember	138,577,000us-gaap_Assets / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Long lived assets	4,589,000us-gaap_NoncurrentAssets / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember				6,035,000us-gaap_NoncurrentAssets / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember					4,589,000us-gaap_NoncurrentAssets / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember	6,035,000us-gaap_NoncurrentAssets / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember	8,486,000us-gaap_NoncurrentAssets / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Kopin U.S.
Segment Reporting Information [Line Items]
Revenues										28,333,000us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = kopn_KopinUnitedStatesMember	19,883,000us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = kopn_KopinUnitedStatesMember	31,879,000us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = kopn_KopinUnitedStatesMember
Kopin U.S. | Continuing Operations
Segment Reporting Information [Line Items]
Net income (loss) income attributable to the controlling interest										(26,402,000)us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = kopn_KopinUnitedStatesMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember	(2,003,000)us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = kopn_KopinUnitedStatesMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember	(17,067,000)us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = kopn_KopinUnitedStatesMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Total assets from continuing operations	121,301,000us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = kopn_KopinUnitedStatesMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember				143,953,000us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = kopn_KopinUnitedStatesMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember					121,301,000us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = kopn_KopinUnitedStatesMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember	143,953,000us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = kopn_KopinUnitedStatesMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember	134,375,000us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = kopn_KopinUnitedStatesMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Long lived assets	4,343,000us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = kopn_KopinUnitedStatesMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember				5,488,000us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = kopn_KopinUnitedStatesMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember					4,343,000us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = kopn_KopinUnitedStatesMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember	5,488,000us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = kopn_KopinUnitedStatesMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember	7,728,000us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = kopn_KopinUnitedStatesMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
FDD
Segment Reporting Information [Line Items]
Revenues										3,474,000us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = kopn_ForthDimensionDisplaysLimitedMember	3,014,000us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = kopn_ForthDimensionDisplaysLimitedMember	2,763,000us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = kopn_ForthDimensionDisplaysLimitedMember
FDD | Continuing Operations
Segment Reporting Information [Line Items]
Net income (loss) income attributable to the controlling interest										(1,810,000)us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = kopn_ForthDimensionDisplaysLimitedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember	(2,707,000)us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = kopn_ForthDimensionDisplaysLimitedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember	(4,083,000)us-gaap_NetIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = kopn_ForthDimensionDisplaysLimitedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Total assets from continuing operations	1,640,000us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = kopn_ForthDimensionDisplaysLimitedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember				2,179,000us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = kopn_ForthDimensionDisplaysLimitedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember					1,640,000us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = kopn_ForthDimensionDisplaysLimitedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember	2,179,000us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = kopn_ForthDimensionDisplaysLimitedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember	4,202,000us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = kopn_ForthDimensionDisplaysLimitedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Long lived assets	$ 246,000us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = kopn_ForthDimensionDisplaysLimitedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember				$ 547,000us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = kopn_ForthDimensionDisplaysLimitedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember					$ 246,000us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = kopn_ForthDimensionDisplaysLimitedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember	$ 547,000us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = kopn_ForthDimensionDisplaysLimitedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember	$ 758,000us-gaap_NoncurrentAssets / us-gaap_StatementBusinessSegmentsAxis = kopn_ForthDimensionDisplaysLimitedMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
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