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Income (Loss) Per Share (Tables) | 12 Months Ended
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Dec. 31, 2020
Income (Loss) Per Share |
Schedule of basic and diluted income (loss) per share and weighted average shares | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the year ended December 31,
​ |  | 2020 |  | 2019 |  | 2018
​ | ​ | (in thousands, except per share amounts)
Net income (loss) | ​ | $ | (8,391) | ​ | $ | (78,733) | ​ | $ | (407,088)
Net income (loss) per common share: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic | ​ | $ | (0.17) | ​ | $ | (1.66) | ​ | $ | (8.63)
Diluted | ​ | $ | (0.17) | ​ | $ | (1.66) | ​ | $ | (8.63)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Basic weighted average shares outstanding | ​ |  | 48,362 | ​ |  | 47,482 | ​ |  | 47,151
Effect of potentially dilutive share-based awards | ​ |  | — | ​ |  | — | ​ |  | —
Diluted weighted average shares outstanding | ​ |  | 48,362 | ​ |  | 47,482 | ​ |  | 47,151
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Common share equivalents excluded from the diluted weighted average shares outstanding since the Company incurred a net loss and their effect would be antidilutive | ​ | ​ | 947 | ​ | ​ | 531 | ​ | ​ | 28
Potentially dilutive shares excluded from the diluted calculation as their effect would be antidilutive | ​ | ​ | 923 | ​ | ​ | 1,689 | ​ | ​ | 2,474
Maximum potential shares to be issued for settlement of the 2023, 2025, and 2027 Notes excluded from the diluted calculation as their effect would be antidilutive | ​ | ​ | 17,753 | ​ | ​ | 8,618 | ​ | ​ | 8,618

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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=6371337&loc=d3e3550-109257 + Details
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