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Discontinued Operations - Schedule of Components of Discontinued Operations of Statements of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 28, 2020 | Dec. 30, 2019 | Dec. 31, 2018
Discontinued Operations And Disposal Groups [Abstract] |  |  |
Net sales | $ 143,951 | $ 556,098 | $ 609,519
Cost of goods sold | 136,800 | 531,592 | 555,154
Gross profit | 7,151 | 24,506 | 54,365
Operating expenses: |  |  |
Selling and marketing | 1,461 | 4,840 | 3,231
General and administrative | 2,317 | 4,875 | 7,464
Research and development | 147 |  |
Amortization of definite-lived intangibles | 809 | 2,698 | 2,698
Restructuring charges |  | 1,601 | 858
Total operating expenses | 4,734 | 14,014 | 14,251
Operating income | 2,417 | 10,492 | 40,114
Other (expense) income: |  |  |
Interest expense | (223) | (1,147) | (3,194)
Gain on sale of the Mobility business unit | 237,253 |  |
Other, net | 1,160 | 2,513 | 5,663
Total other income, net | 238,190 | 1,366 | 2,469
Income from discontinued operations before income taxes | 240,607 | 11,858 | 42,583
Income tax provision | (46,686) | (2,478) | (4,391)
Income from discontinued operations, net of income taxes | $ 193,921 | $ 9,380 | $ 38,192
Earnings per share from discontinued operations: |  |  |
Basic earnings per share from discontinued operations | $ 1.82 | $ 0.09 | $ 0.37
Diluted earnings per share from discontinued operations | $ 1.82 | $ 0.09 | $ 0.28

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