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Discontinued Operations - Schedule of Components of Discontinued Operations of Statements of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2020	Sep. 30, 2019	Sep. 28, 2020	Sep. 30, 2019
Discontinued Operations And Disposal Groups [Abstract]
Net sales		$ 182,644	$ 143,951	$ 372,560
Cost of goods sold		164,068	136,800	372,358
Gross profit		18,576	7,151	202
Operating expenses:
Selling and marketing		1,247	1,461	3,557
General and administrative		1,424	2,317	4,166
Research and development			147
Amortization of definite-lived intangibles		675	809	2,023
Total operating expenses		3,346	4,734	9,746
Operating income (loss)		15,230	2,417	(9,544)
Other (expense) income:
Interest expense		(145)	(223)	(1,016)
Gain on sale of the Mobility business unit			237,253
Other, net		2,251	1,160	3,692
Total other income, net		2,106	238,190	2,676
Income (loss) from discontinued operations before income taxes		17,336	240,607	(6,868)
Income tax benefit (provision)	$ 20,021	(3,859)	(46,686)	1,786
Income (loss) from discontinued operations, net of income taxes	$ 20,021	$ 13,477	$ 193,921	$ (5,082)
Earnings (loss) per share from discontinued operations:
Basic earnings (loss) per share from discontinued operations	$ 0.19	$ 0.13	$ 1.83	$ (0.05)
Diluted earnings (loss) per share from discontinued operations	$ 0.19	$ 0.13	$ 1.83	$ (0.05)

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