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Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($)	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Income Statement [Abstract]
Net loss	$ (4,185,723)	$ (3,656,991)
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments	(27,842)	189,078
Unrealized holding gain (loss) on marketable securities	8,286	(278,362)
Reclassification of holding losses in net loss		(9,348)
Other comprehensive loss, net of tax	(19,556)	(98,632)
Comprehensive loss	(4,205,279)	(3,755,623)
Comprehensive loss attributable to the noncontrolling interest	39,485	61,472
Comprehensive loss attributable to Kopin Corporation	$ (4,165,794)	$ (3,694,151)

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