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Discontinued Operations - Summary Of Financial Information That Has Been Reported As Discontinued Operations (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Discontinued operations: |  |
Net income from discontinued operations | $ 0 | $ 42,158
Discontinued Operations, Held-for-sale |  |
Discontinued operations: |  |
Revenue | 0 | 11,031
Operating expenses | 0 | (11,572)
Depreciation and amortization | 0 | 0
Research and development | 0 | (69)
(Loss) income from operations | 0 | (610)
Other income | 0 | 35
Gain on sale of businesses | 0 | 65,417
Income before income taxes | 0 | 64,842
Income tax expense | 0 | (22,684)
Net income from discontinued operations | $ 0 | $ 42,158

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