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Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 25, 2021	Sep. 26, 2020	Sep. 25, 2021	Sep. 26, 2020
Income Statement [Abstract]
Net loss	$ (2,128,683)	$ (968,769)	$ (10,163,289)	$ (5,768,943)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	9,575	(82,815)	(44,592)	69,228
Unrealized holding gain (loss) on marketable securities	10,125	(21,725)	(11,755)	(204,404)
Reclassification of holding losses in net loss				(21,028)
Other comprehensive income (loss), net of tax	19,700	(104,540)	(56,347)	(156,204)
Comprehensive loss	(2,108,983)	(1,073,309)	(10,219,636)	(5,925,147)
Comprehensive (income) loss attributable to the noncontrolling interest	(107)	11,329	39,394	94,443
Comprehensive loss attributable to Kopin Corporation	$ (2,109,090)	$ (1,061,980)	$ (10,180,242)	$ (5,830,704)

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