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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Income Statement [Abstract] |  |
Revenue | $ 53,141 | $ 119,353
Costs and expenses: |  |
Operating expenses (excluding depreciation and amortization) | 88,266 | 148,100
Corporate general and administrative | 16,311 | 27,975
Depreciation and amortization | 3,412 | 8,465
Research and development | 7,213 | 8,863
(Gain) loss on disposal of long-lived assets | (94) | 1,450
Impairment of fixed assets | 69,975 | 0
Impairment of goodwill | 11,706 | 0
Total costs and expenses | 196,789 | 194,853
Loss from operations | (143,648) | (75,500)
Other (expense) income: |  |
Gain on lease termination | 576 | 0
Interest expense | (60) | (2,019)
Other income (expense), net | 503 | 1,708
Total other income (expense) | 1,019 | (311)
Loss before income taxes | (142,629) | (75,811)
Income tax benefit (expense) | 6,179 | (262)
Loss from continuing operations | (136,450) | (76,073)
Income from discontinued operations, net of tax | 0 | 42,158
Net loss | $ (136,450) | $ (33,915)
Basic and diluted earnings (loss) per common share: |  |
Continuing operations (in dollars per share) | $ (2.00) | $ (1.29)
Discontinued operations, net of tax (in dollars per share) | 0 | 0.72
Basic earnings (loss) per common share (in dollars per share) | $ (2.00) | $ (0.57)
Weighted average common shares: |  |
Weighted average common shares used in computing basic and diluted loss per common share | 68,312 | 58,750

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