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Basic and diluted earnings per share (Tables) | 6 Months Ended
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Jun. 30, 2021
Basic and diluted earnings per share |
Schedule of bsic and diluted earnings per share | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended June 30, | ​ | Six months ended June 30,
​ |  | 2021 |  | 2020 | ​ | 2021 | ​ | 2020
​ | ​ | (in thousands) | ​ | (in thousands)
Numerator: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net income / (loss) attributable to ordinary shares | ​ | $ | 399,468 | ​ | $ | (42,551) | ​ | $ | 357,912 | ​ | $ | (70,550)
​ | ​ | ​ | 399,468 | ​ | ​ | (42,551) | ​ | ​ | 357,912 | ​ | ​ | (70,550)
Denominator: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted-average number of ordinary shares outstanding - basic | ​ | ​ | 46,037,900 | ​ | ​ | 44,387,463 | ​ | ​ | 45,754,766 | ​ | ​ | 44,333,460
Stock options under 2014 Plans and previous plan | ​ | ​ | 797,165 | ​ | ​ | — | ​ | ​ | 824,101 | ​ | ​ | —
Non-vested RSUs and PSUs | ​ | ​ | 92,681 | ​ | ​ | — | ​ | ​ | 98,514 | ​ | ​ | —
Employee share purchase plan | ​ | ​ | 2,124 | ​ | ​ | — | ​ | ​ | 1,454 | ​ | ​ | —
Weighted-average number of ordinary shares outstanding - diluted | ​ | ​ | 46,929,870 | ​ | ​ | 44,387,463 | ​ | ​ | 46,678,835 | ​ | ​ | 44,333,460
Schedule of potential dilutive common shares | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three months ended June 30, | ​ | Six months ended June 30,
​ |  | 2021 |  | 2020 | ​ | 2021 | ​ | 2020
​ | ​ | (in thousands) | ​ | (in thousands)
Anti-dilutive ordinary share equivalents | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Stock options under 2014 Plans and previous plan | ​ | ​ | 2,634,766 | ​ | ​ | 2,893,733 | ​ | ​ | 2,607,830 | ​ | ​ | 2,893,733
Non-vested RSUs and PSUs | ​ | ​ | 757,544 | ​ | ​ | 645,636 | ​ | ​ | 751,711 | ​ | ​ | 645,636
Employee share purchase plan | ​ | ​ | 1,414 | ​ | ​ | 254 | ​ | ​ | 1,802 | ​ | ​ | 254
BMS warrants (derecognized as of December 1, 2020 - see Note 4, "Fair value measurement") | ​ | ​ | — | ​ | ​ | 8,060,500 | ​ | ​ | — | ​ | ​ | 8,060,500
Total anti-dilutive ordinary share equivalents | ​ | ​ | 3,393,724 | ​ | ​ | 11,600,123 | ​ | ​ | 3,361,343 | ​ | ​ | 11,603,143

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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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