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Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Income Statement [Abstract]
Net loss	$ (968,769)	$ (6,505,364)	$ (5,768,943)	$ (22,062,298)
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments	(82,815)	(21,163)	69,228	(22,201)
Unrealized holding (loss) gain on marketable securities	(21,725)	39,967	(204,404)	366,224
Reclassification of holding losses in net loss		(8,086)	(21,028)	(15,520)
Other comprehensive (loss) income, net of tax	(104,540)	10,718	(156,204)	328,503
Comprehensive loss	(1,073,309)	(6,494,646)	(5,925,147)	(21,733,795)
Comprehensive loss (income) attributable to the noncontrolling interest	11,329	(120,094)	94,443	(154,478)
Comprehensive loss attributable to Kopin Corporation	$ (1,061,980)	$ (6,614,740)	$ (5,830,704)	$ (21,888,273)

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