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Earnings/(loss) per Share (Tables) | 6 Months Ended
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Jun. 30, 2021
Earnings/(loss) per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30,
​ |  | 2021 |  | 2020
Net income/(loss) | ​ | $ | 1,520 | ​ | $ | (113,617)
Less dividends on series B preferred shares | ​ |  | (2,884) | ​ |  | (2,884)
Net loss attributed to common stockholders | ​ | $ | (1,364) | ​ | $ | (116,501)
​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted average number of common shares, basic and diluted | ​ |  | 82,792,000 | ​ |  | 86,012,939
Loss per share, basic and diluted | ​ | $ | (0.02) | ​ | $ | (1.35)

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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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