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Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 26, 2021	Jun. 27, 2020	Jun. 26, 2021	Jun. 27, 2020
Income Statement [Abstract]
Net loss	$ (3,848,883)	$ (1,143,183)	$ (8,034,606)	$ (4,800,174)
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments	(26,326)	(37,035)	(54,167)	152,043
Unrealized holding gain (loss) on marketable securities	(30,165)	95,683	(21,880)	(182,679)
Reclassification of holding losses in net loss		(11,680)		(21,028)
Other comprehensive (loss) income, net of tax	(56,491)	46,968	(76,047)	(51,664)
Comprehensive loss	(3,905,374)	(1,096,215)	(8,110,653)	(4,851,838)
Comprehensive loss attributable to the noncontrolling interest	16	21,642	39,501	83,114
Comprehensive loss attributable to Kopin Corporation	$ (3,905,358)	$ (1,074,573)	$ (8,071,152)	$ (4,768,724)

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