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CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Income Statement [Abstract] |  |  |  |
Revenue | $ 80,456 | $ 54,014 | $ 148,061 | $ 111,304
Cost of revenue | 82,054 | 54,713 | 149,106 | 111,324
Gross loss | (1,598) | (699) | (1,045) | (20)
General and administrative expense | 3,987 | 5,092 | 7,821 | 9,801
Asset impairment and (gain) loss on assets held for sale, net | 0 | (6,579) | (70) | (5,829)
Other (income) expense, net | (201) | 64 | (130) | 375
Operating income (loss) | (5,384) | 724 | (8,666) | (4,367)
Interest income (expense), net | 126 | (92) | 388 | (238)
Net income (loss) before income taxes | (5,258) | 632 | (8,278) | (4,605)
Income tax (expense) benefit | 10 | (83) | (12) | (142)
Net income (loss) | $ (5,248) | $ 549 | $ (8,290) | $ (4,747)
Per share data: |  |  |  |
Basic and diluted income (loss) per common share (in dollars per share) | $ (0.34) | $ 0.04 | $ (0.55) | $ (0.32)

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- Definition The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=117326831&loc=d3e1337-109256 + Details
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