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Note 15 - Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2021
Earnings Per Share [Abstract] |
Summary of Reconciliation of Basic and Diluted Earnings Per Share | A reconciliation of the amounts used to calculate basic and diluted earnings per share for the three and nine months ended September 30, 2021 and 2020 follows:
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
(in millions) |  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Net income (loss) |  | $ | 8 |  |  | $ | (445 | ) |  | $ | 30 |  |  | $ | (561 | )
Less: Series B preferred stock cash and deemed dividends |  |  | (1 | ) |  |  | — |  |  |  | (3 | ) |  |  | — |
Less: Series C preferred stock in-kind and deemed dividends |  |  | (2 | ) |  |  | — |  |  |  | (4 | ) |  |  | — |
Less: Series A preferred stock cash and deemed dividends |  |  | — |  |  |  | (5 | ) |  |  | (3 | ) |  |  | (15 | )
Plus: Expiration of Series A preferred stock embedded derivative |  |  | — |  |  |  | — |  |  |  | 11 |  |  |  | — |
Net income (loss) available to common shareholders - basic and diluted |  | $ | 5 |  |  | $ | (450 | ) |  | $ | 31 |  |  | $ | (576 | )
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
(in millions of shares) |  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Weighted average shares — basic |  |  | 78.6 |  |  |  | 64.8 |  |  |  | 78.3 |  |  |  | 50.8 |
Effect of dilutive securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employee stock options |  |  | 1.9 |  |  |  | — |  |  |  | 2.1 |  |  |  | — |
Unvested restricted stock units |  |  | 0.1 |  |  |  | — |  |  |  | 0.1 |  |  |  | — |
Weighted average shares — diluted |  |  | 80.6 |  |  |  | 64.8 |  |  |  | 80.5 |  |  |  | 50.8 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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