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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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