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Consolidated Statements of Comprehensive Loss - USD ($)	12 Months Ended
	Dec. 26, 2020	Dec. 28, 2019	Dec. 29, 2018
Income Statement [Abstract]
Net loss	$ (4,530,925)	$ (29,374,222)	$ (34,482,492)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(67,852)	(206,580)	(1,912,427)
Unrealized holding gain (loss) on marketable securities	(183,870)	446,533	(264,949)
Reclassifications of (loss) gain in net loss on marketable securities	(21,028)	(37,356)	49,525
Other comprehensive income (loss), net of tax	(272,750)	202,597	(2,127,851)
Comprehensive loss	(4,803,675)	(29,171,625)	(36,610,343)
Comprehensive (income) loss attributable to the noncontrolling interest	119,813	(132,030)	66,609
Comprehensive loss attributable to Kopin Corporation	$ (4,683,862)	$ (29,303,655)	$ (36,543,734)

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