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Earnings (loss) Per Share - Schedule of Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Basic earnings (loss) per share computation |  |  |  |
Income (loss) from continuing operations attributable to common shareholders of Cronos Group |  | $ (72,487) | $ 1,166,869 | $ (20,742)
Weighted average number of common shares outstanding (in shares) |  | 351,576,848 | 310,067,179 | 172,269,170
Basic earnings (loss) per share (in dollars per share) |  | $ (0.21) | $ 3.76 | $ (0.12)
Diluted earnings (loss) per share computation |  |  |  |
Income (loss) from continuing operations used in the computation of basic earnings (loss) per share |  | $ (72,487) | $ 1,166,869 | $ (20,742)
Adjustment for gain on revaluation of derivative liabilities |  | 0 | (24,416) | 0
Income (loss) from continuing operations used in the computation of diluted income (loss) per share |  | $ (72,487) | $ 1,142,453 | $ (20,742)
Weighted average number of common shares outstanding (in shares) |  | 351,576,848 | 310,067,179 | 172,269,170
Weighted average number of common shares for computation of diluted income (loss) per share (in shares) | [1] | 351,576,848 | 342,811,992 | 172,269,170
Diluted earnings (loss) per share (in dollars per share) | [1] | $ (0.21) | $ 3.33 | $ (0.12)
Basic loss from discontinued operations per share computation |  |  |  |
Loss from discontinued operations attributable to common shareholders of Cronos Group |  | $ (650) | $ (363) | $ (894)
Weighted average number of common shares outstanding (in shares) |  | 351,576,848 | 310,067,179 | 172,269,170
Basic loss from discontinued operations per share (in dollars per share) |  | $ (0.00) | $ (0.00) | $ (0.01)
Altria Warrant |  |  |  |
Diluted earnings (loss) per share computation |  |  |  |
Dilutive effect of derivative liabilities (in shares) |  | 0 | 0 | 0
Top-up Rights |  |  |  |
Diluted earnings (loss) per share computation |  |  |  |
Dilutive effect of derivative liabilities (in shares) |  | 0 | 1,881,002 | 0
Warrants |  |  |  |
Diluted earnings (loss) per share computation |  |  |  |
Dilutive effect of awards (in shares) |  | 0 | 19,481,352 | 0
Stock options |  |  |  |
Diluted earnings (loss) per share computation |  |  |  |
Dilutive effect of awards (in shares) |  | 0 | 10,649,487 | 0
Restricted share units |  |  |  |
Diluted earnings (loss) per share computation |  |  |  |
Dilutive effect of awards (in shares) |  | 0 | 732,972 | 0
[1] | In computing diluted earnings per share, incremental common shares are not considered in periods in which a net loss is reported, as the inclusion of the common share equivalents would be anti-dilutive.

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- Definition Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise stock options, restrictive stock units (RSUs), convertible preferred stock of an employee stock ownership plan (ESOP), and other dilutive convertible securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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