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v3.20.1

Share capital - Schedule of warrants outstanding and exercise price (Details) - $ / shares | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Disclosure of warrants [Line Items] |  |  |
Exercise price of warrants outstanding | $ 10.20 | $ 9.47 | $ 5.80
Number of warrants outstanding | 467,451 | 546,212 | 354,996
Warrants by expiry date at November 30, 2020 |  |  |
Disclosure of warrants [Line Items] |  |  |
Exercise price of warrants outstanding | $ 2.61 |  |
Number of warrants outstanding | 16,787 |  |
Warrants by expiry date at September 15, 2022 |  |  |
Disclosure of warrants [Line Items] |  |  |
Exercise price of warrants outstanding | $ 4.42 | $ 4.42 |
Number of warrants outstanding | 199,005 | 199,005 |
Warrants by expiry date at August 1, 2021 |  |  |
Disclosure of warrants [Line Items] |  |  |
Exercise price of warrants outstanding | $ 5.43 |  |
Number of warrants outstanding | 4,476 |  |
Warrants by expiry date at September 11, 2023 |  |  |
Disclosure of warrants [Line Items] |  |  |
Exercise price of warrants outstanding | $ 5.43 |  |
Number of warrants outstanding | 22,382 |  |
Warrants by expiry date at January 5, 2020 |  |  |
Disclosure of warrants [Line Items] |  |  |
Exercise price of warrants outstanding | $ 6.03 | $ 6.03 |
Number of warrants outstanding | 37,313 | 37,313 |
Warrants by expiry date at July 24, 2023 |  |  |
Disclosure of warrants [Line Items] |  |  |
Exercise price of warrants outstanding | $ 13.07 |  |
Number of warrants outstanding | 3,357 |  |
Warrants by expiry date at May 20, 2023 |  |  |
Disclosure of warrants [Line Items] |  |  |
Exercise price of warrants outstanding | $ 16.08 |  |
Number of warrants outstanding | 7,311 |  |
Warrants by expiry date at May 24, 2022 |  |  |
Disclosure of warrants [Line Items] |  |  |
Exercise price of warrants outstanding | $ 18.09 | $ 18.09 |
Number of warrants outstanding | 163,535 | 163,733 |
Warrants by expiry date at May 4, 2025 |  |  |
Disclosure of warrants [Line Items] |  |  |
Exercise price of warrants outstanding | $ 26.73 |  |
Number of warrants outstanding | 3,730 |  |
Warrants by expiry date at May 10, 2025 |  |  |
Disclosure of warrants [Line Items] |  |  |
Exercise price of warrants outstanding | $ 26.73 |  |
Number of warrants outstanding | 1,865 |  |
Warrants by expiry date at May 17, 2025 |  |  |
Disclosure of warrants [Line Items] |  |  |
Exercise price of warrants outstanding | $ 26.73 |  |
Number of warrants outstanding | 3,730 |  |
Warrants by expiry date at May 31, 2025 |  |  |
Disclosure of warrants [Line Items] |  |  |
Exercise price of warrants outstanding | $ 26.73 |  |
Number of warrants outstanding | 1,865 |  |
Warrants by expiry date at January 16, 2026 |  |  |
Disclosure of warrants [Line Items] |  |  |
Exercise price of warrants outstanding | $ 26.73 |  |
Number of warrants outstanding | 1,722 |  |
Warrants by expiry date at January 20, 2026 |  |  |
Disclosure of warrants [Line Items] |  |  |
Exercise price of warrants outstanding | $ 26.73 |  |
Number of warrants outstanding | 373 |  |
Warrants by expiry date at October 20, 2019 |  |  |
Disclosure of warrants [Line Items] |  |  |
Exercise price of warrants outstanding |  | $ 7.56 |
Number of warrants outstanding |  | 11,970 |
Warrants by expiry date at November 1, 2019 |  |  |
Disclosure of warrants [Line Items] |  |  |
Exercise price of warrants outstanding |  | $ 7.56 |
Number of warrants outstanding |  | 69,240 |
Warrants by expiry date at November 14, 2019 |  |  |
Disclosure of warrants [Line Items] |  |  |
Exercise price of warrants outstanding |  | $ 7.56 |
Number of warrants outstanding |  | 52,532 |
Warrants by expiry date at November 21, 2019 |  |  |
Disclosure of warrants [Line Items] |  |  |
Exercise price of warrants outstanding |  | $ 7.56 |
Number of warrants outstanding |  | 10,263 |
Warrants by expiry date at December 12, 2019 |  |  |
Disclosure of warrants [Line Items] |  |  |
Exercise price of warrants outstanding |  | $ 7.56 |
Number of warrants outstanding |  | 1,084 |
Warrants by expiry date at December 29, 2019 |  |  |
Disclosure of warrants [Line Items] |  |  |
Exercise price of warrants outstanding |  | $ 7.56 |
Number of warrants outstanding |  | 1,072 |

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