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EVENTS SUBSEQUENT TO DECEMBER 31, 2020 (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended |  |
--- | --- | --- | --- | ---
Feb. 28, 2021 | Jan. 31, 2021 | Dec. 31, 2018 | Aug. 31, 2018 | Mar. 31, 2021 | Mar. 11, 2021 | Dec. 31, 2020
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |
Agreement amount payable for acquisition of rights |  |  |  |  |  |  | $ 26.6
ADSs |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |
Number of shares issued |  |  | 2,857,143 | 4,166,667 |  |  |
Proceeds from issuance of shares, gross |  |  | $ 20.0 | $ 25.0 |  |  |
Proceeds from issuance of shares |  |  | $ 18.4 | $ 23.5 |  |  |
ADSs | Major ordinary share transactions |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |
Number of shares issued | 4,647,433 | 3,188,776 |  |  | 428,421 |  |
Proceeds from issuance of shares, gross | $ 37.0 | $ 25.0 |  |  |  |  |
Proceeds from issuance of shares | $ 34.8 | $ 23.1 |  |  | $ 3.5 |  |
Movantik | AstraZeneca AB |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |
Agreement amount payable for acquisition of rights |  |  |  |  |  |  | $ 15.5
Movantik | AstraZeneca AB | Agreement amendment |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |
Agreement amount payable for acquisition of rights |  |  |  |  |  | $ 16.0 |

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