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Share capital (Tables)
 12 Months Ended
Dec. 31, 2019
Disclosure of reserves within equity [abstract]  
Schedule of changes in share capital
  Class A shares  Class B shares  Warrants 
  #  $  #  $  #  $ 
                   
Balance, December 31, 2017 72  201,500  3,794,846  12,794,963  354,996  2,116,900 
Share issued —  —  2,268,035  47,853,745  —  — 
Share issuance costs —  —  —  (6,634,405) —  — 
Reverse acquisition —  —  545,505  9,868,179  37,313  118,875 
Warrant valuations —  —  —  (2,366,670) 198,835  2,366,670 
Share-based payments —  —  —  —  —  294,287 
Share options exercised —  —  190,463  5,145,825  —  — 
Share options cancelled —  —  —  —  —  — 
Warrants exercised —  —  44,931  1,254,665  (44,932) (454,587)
Balance, December 31, 2018 72  201,500  6,843,780  67,916,302  546,212  4,442,145 
                   
Balance, December 31, 2018 72  201,500  6,843,780  67,916,302  546,212  4,442,145 
Shares issued [a] [b] [c] [d] [e]  —  —  408,651  11,539,417  —  — 

Issued on acquisition of net assets of Prismic

                  

Pharmaceuticals, Inc. [f]

 —  —  510,940  16,431,818  67,598  1,888,086 
Share options exercised —  —  130,189  1,782,438  —  — 
Warrants exercised —  —  12,167  145,174  (12,167) (50,183)
Warrants expired —  —  —  

—

  (134,192) (535,014)
Balance, December 31, 2019 72  201,500  7,905,727  97,815,149  467,451  5,745,034 
Disclosure of changes in warrants outstanding and weighted average exercise price
  Number of warrants  Weighted average exercise price
  #  $
Outstanding as at December 31, 2017 354,996  5.80
Granted 236,148  16.57
Exercised (44,932) 17.79
Outstanding as at December 31, 2018 546,212  9.47
Granted 67,598  10.45
Exercised (12,167) 7.81
Expired (134,192) 7.64
Outstanding as at December 31, 2019 467,451  10.20
Disclosure of fair value assumptions of warrants outstanding
 20192018
Grant date share price$32.16$4.42 - $18.09
Exercise price$2.61 - $26.73$4.42 - $26.13
Expected dividend yield——
Risk free interest rate1.41% - 1.52%1.70% - 2.17%
Expected life1.39 - 6.552 years
Expected volatility100%100%

 
Disclosure of number of warrants outstanding and exercise price

The following table is a summary of the Company's warrants outstanding as at December 31, 2019:
 

Warrants Outstanding

 
  Exercise price  Number outstanding
Expiry Date $  #
November 30, 2020 2.61  16,787
September 15, 2022 4.42  199,005
August 1, 2021 5.43  4,476
September 11, 2023 5.43  22,382
January 5, 2020 6.03  37,313
July 24, 2023 13.07  3,357
May 20, 2023 16.08  7,311
May 24, 2022 18.09  163,535
May 4, 2025 26.73  3,730
May 10, 2025 26.73  1,865
May 17, 2025 26.73  3,730
May 31, 2025 26.73  1,865
January 16, 2026 26.73  1,722
January 20, 2026 26.73  373
  10.20  467,451


The following table is a summary of the Company's warrants outstanding as at December 31, 2018:
 

Warrants Outstanding
 

  Exercise price  Number outstanding
Expiry Date $  #
      
September 15, 2022 4.42  199,005
October 20, 2019 7.56  11,970
November 1, 2019 7.56  69,240
November 14, 2019 7.56  52,532
November 21, 2019 7.56  10,263
December 12, 2019 7.56  1,084
December 29, 2019 7.56  1,072
January 5, 2020 6.03  37,313
May 24, 2022 18.09  163,733
  9.47  546,212