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Share-Based Payments - Warrants Rectified (Details) $ in Millions | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2020 USD ($) shares | Oct. 31, 2019 USD ($) shares | Sep. 30, 2019 USD ($) shares | Feb. 28, 2019 USD ($) shares | Jan. 31, 2019 USD ($) shares | Dec. 31, 2018 USD ($) shares | Dec. 31, 2020 USD ($) | Dec. 31, 2019 | Dec. 31, 2018 USD ($) | Dec. 31, 2017
Employees |  |  |  |  |  |  |  |  |  |
Share-Based Payments |  |  |  |  |  |  |  |  |  |
Warrants outstanding |  |  |  |  |  | 22,032 |  | 22,032 | 22,032 |
Warrants |  |  |  |  |  |  |  |  |  |
Share-Based Payments |  |  |  |  |  |  |  |  |  |
Number of share options granted in share-based payment arrangement |  |  |  |  |  |  | 363,168 | 257,832 | 192,528 |
Warrants outstanding | 2,228,076 |  |  |  |  | 1,674,324 | 2,228,076 | 1,932,156 | 1,674,324 | 1,481,796
Warrants | Employees and consultants |  |  |  |  |  |  |  |  |  |
Share-Based Payments |  |  |  |  |  |  |  |  |  |
Number of share options granted in share-based payment arrangement |  |  |  |  |  | 99,216 |  |  |  |
Warrants granted with immediate vesting |  |  |  |  |  | 32,904 |  |  |  |
Warrants Granted With Vesting Over The Next Three Years |  |  |  |  |  | 66,312 |  |  |  |
Weighted average fair value at measurement date, share options granted | $ |  |  |  |  |  | $ 0.6 |  |  | $ 0.6 |
Warrants | Employees |  |  |  |  |  |  |  |  |  |
Share-Based Payments |  |  |  |  |  |  |  |  |  |
Warrants granted with immediate vesting |  |  | 54,000 |  |  |  |  |  |  |
Warrants Granted With Vesting Over The Next Three Years |  |  |  | 7,956 |  |  |  |  |  |
Weighted average fair value at measurement date, share options granted | $ |  |  | $ 0.5 | $ 0.1 |  |  |  |  |  |
Warrants | Executive Management |  |  |  |  |  |  |  |  |  |
Share-Based Payments |  |  |  |  |  |  |  |  |  |
Warrants granted with immediate vesting |  |  |  |  |  | 3,888 |  |  |  |
Warrants Granted With Vesting Over The Next Three Years |  | 150,660 |  |  | 45,216 |  |  |  |  |
Weighted average fair value at measurement date, share options granted | $ |  | $ 1.3 |  |  | $ 0.3 |  |  |  |  |
Service period |  | 3 years |  |  |  |  |  |  |  |
Warrants | Board of Directors |  |  |  |  |  |  |  |  |  |
Share-Based Payments |  |  |  |  |  |  |  |  |  |
Warrants granted with immediate vesting |  |  |  |  |  | 89,424 |  |  |  |
Weighted average fair value at measurement date, share options granted | $ |  |  |  |  |  | $ 0.5 |  |  | $ 0.5 |
2019 warrants entitlements |  |  |  |  |  |  |  |  |  |
Share-Based Payments |  |  |  |  |  |  |  |  |  |
Number of share options granted in share-based payment arrangement | 126,972 |  |  |  |  |  |  |  |  |
Warrants granted with immediate vesting | 63,612 |  |  |  |  |  |  |  |  |
Warrants Granted With Vesting Over The Next Three Years | 63,360 |  |  |  |  |  |  |  |  |
Weighted average fair value at measurement date, share options granted | $ | $ 1.2 |  |  |  |  |  | $ 1.2 |  |  |
Service period | 3 years |  |  |  |  |  |  |  |  |
2020 warrants entitlements |  |  |  |  |  |  |  |  |  |
Share-Based Payments |  |  |  |  |  |  |  |  |  |
Number of share options granted in share-based payment arrangement | 236,196 |  |  |  |  |  |  |  |  |
Warrants granted with immediate vesting | 120,888 |  |  |  |  |  |  |  |  |
Warrants Granted With Vesting Over The Next Three Years | 115,308 |  |  |  |  |  |  |  |  |
Weighted average fair value at measurement date, share options granted | $ | $ 2.3 |  |  |  |  |  | $ 2.3 |  |  |
Service period | 3 years |  |  |  |  |  |  |  |  |

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