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Income (Loss) per Share | 6 Months Ended
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Jun. 30, 2020
Earnings Per Share [Abstract] |
Income (Loss) per Share | Income (Loss) per Share Basic income (loss) per share is computed by dividing net income (loss) attributable to common stockholders by the sum of the weighted-average number of common shares outstanding and the weighted-average number of shares issuable under the common stock warrants, representing 161 thousand shares during the six months ended June 30, 2020 and 354 thousand shares during the three and six months ended June 30, 2019, respectively. The common stock warrants are included in the calculation of basic income (loss) per share because they were issuable for minimal consideration. As of March 31, 2020, the previously outstanding common stock warrants had been exercised for common stock and no warrants were outstanding. The following table sets forth the computation of basic and diluted income (loss) per share (in thousands, except per share amounts):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2020 |  | 2019 |  | 2020 |  | 2019
Net income (loss) | $ | (40,560 | ) |  | $ | 28,169 |  |  | $ | (262,897 | ) |  | $ | 89,261 |
Less: Undistributed income allocated to participating securities (1) | — |  |  | 324 |  |  | — |  |  | 1,021 |
Net income (loss) attributable to common stockholders | (40,560 | ) |  | 27,845 |  |  | (262,897 | ) |  | 88,240 |
Plus: Net income effect of convertible securities | — |  |  | — |  |  | — |  |  | 8,897 |
Numerator for diluted income (loss) per common share | $ | (40,560 | ) |  | $ | 27,845 |  |  | $ | (262,897 | ) |  | $ | 97,137 |
Basic weighted-average common stock shares outstanding | 53,265 |  |  | 49,960 |  |  | 53,246 |  |  | 49,529 |
Plus: dilutive effects of common stock equivalents (2) | — |  |  | 114 |  |  | — |  |  | 6,051 |
Diluted weighted-average common stock shares outstanding | 53,265 |  |  | 50,074 |  |  | 53,246 |  |  | 55,580 |
Basic income (loss) per common share | $ | (0.76 | ) |  | $ | 0.56 |  |  | $ | (4.94 | ) |  | $ | 1.78 |
Diluted income (loss) per common share | $ | (0.76 | ) |  | $ | 0.56 |  |  | $ | (4.94 | ) |  | $ | 1.75 |
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(1) | Participating securities include restricted stock that had been issued but has not yet vested during the three and six months ended June 30, 2019. These participating securities were fully vested as of December 31, 2019.
(2) | Entities with a net loss from continuing operations are prohibited from including potential common shares in the computation of diluted per share amounts. We have utilized the basic shares outstanding to calculate both basic and diluted loss per common share for the three and six months ended June 30, 2020.
For each of the three and six months ended June 30, 2019, our calculation of diluted shares outstanding excluded 8 thousand shares of unvested restricted stock. Additionally, the calculation of diluted shares outstanding for the three and six months ended June 30, 2019 excluded 1.9 million and 1.8 million stock options, respectively. As discussed in Note 10—Debt, we have the option of settling the 5.00% Convertible Senior Notes in cash or shares of common stock, or any combination thereof, upon conversion. For the three and six months ended June 30, 2019, diluted income per share was determined using the if-converted method. Our calculation of diluted shares outstanding for the three months ended June 30, 2019 excluded 5.6 million common stock equivalents, as the effect would be anti-dilutive.

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