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Discontinued Operations - Summary of Operating Results of Discontinued Operations Reflected on Consolidated Statement of Operations (Details) - Discontinued Operations, Held-for-sale - CES - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Revenue | $ 1,460 | $ 1,477
Cost of revenue | (1,173) | (1,087)
Selling, general, and administrative | (714) | (504)
Depreciation and amortization | 0 | (29)
Other income (expense) | 150 | 0
Pre-tax income (loss) from continuing operations | (277) | (143)
Provision for (benefit from) income tax | (10) | 0
Net income (loss) from discontinued operations | $ (267) | $ (143)

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