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EARNINGS PER COMMON SHARE | 6 Months Ended
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Jun. 30, 2019
EARNINGS PER COMMON SHARE |
EARNINGS PER COMMON SHARE | 12. EARNINGS PER COMMON SHARE The following represents the calculation of earnings (loss) per share (in thousands, except per share amounts):
|  | Three Months Ended |  | Six Months Ended
|  | June 30, |  | June 30,
|  | 2019 |  | 2018 |  | 2019 |  | 2018
Basic: |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  | $ | (640,844) |  | $ | (16,274) |  | $ | (977,403) |  | $ | (18,872)
Weighted average basic number of common shares outstanding |  |  | 159,050 |  |  | 157,943 |  |  | 158,801 |  |  | 155,925
Basic net income (loss) per share of common stock |  | $ | (4.03) |  | $ | (0.10) |  | $ | (6.15) |  | $ | (0.12)
Diluted: |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) |  | $ | (640,844) |  | $ | (16,274) |  | $ | (977,403) |  | $ | (18,872)
Weighted average basic number of common shares outstanding |  |  | 159,050 |  |  | 157,943 |  |  | 158,801 |  |  | 155,925
Common stock equivalent shares representing shares issuable upon: |  |  |  |  |  |  |  |  |  |  |  |
Exercise of stock options |  |  | Anti-dilutive |  |  | Anti-dilutive |  |  | Anti-dilutive |  |  | Anti-dilutive
Exercise of warrants |  |  | Anti-dilutive |  |  | Anti-dilutive |  |  | Anti-dilutive |  |  | Anti-dilutive
Vesting of restricted shares |  |  | Anti-dilutive |  |  | Anti-dilutive |  |  | Anti-dilutive |  |  | Anti-dilutive
Weighted average diluted number of common shares outstanding |  |  | 159,050 |  |  | 157,943 |  |  | 158,801 |  |  | 155,925
Diluted net income (loss) per share of common stock |  | $ | (4.03) |  | $ | (0.10) |  | $ | (6.15) |  | $ | (0.12)
Common stock equivalents, including stock options, restricted shares and warrants totaling 15.7 million and 15.3 million shares for the three and six months ended June 30, 2019, respectively, were not included in the computation of diluted earnings per share of common stock because the effect would have been anti-dilutive due to the net losses. Common stock equivalents, including stock options, restricted shares and warrants totaling 14.9 million and 14.0 million shares for the three and six months ended June 30, 2018, respectively, were not included in the computation of diluted earnings per share of common stock because the effect would have been anti-dilutive due to the net losses.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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