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Share-based compensation (Tables)
12 Months Ended
Dec. 31, 2021
Disclosure of terms and conditions of share-based payment arrangement [abstract]  
Schedule of stock options granted
          Weighted average  
    Number of options     exercise price  
    #     C$  
Outstanding as at December 31, 2018   485,159     74.53  
Granted   1,363,322     20.68  
Exercised   (82,094 )   10.02  
Forfeited   (12,438 )   56.28  
Cancelled   (299,006 )   115.80  
Outstanding as at December 31, 2019   1,454,943     21.96  
Exercisable as at December 31, 2019   1,200,242     21.24  

 

          Weighted average  
    Number of options     exercise price  
    #     C$  
Outstanding as at December 31, 2019   1,454,943     21.96  
Granted   1,082,639     4.14  
Exercised   (22,382 )   2.61  
Cancelled   (822,137 )   31.65  
Outstanding as at December 31, 2020   1,693,063     6.11  
Exercisable as at December 31, 2020   1,528,186     6.13  
             
          Weighted average  
    Number of options     exercise price  
    #     C$  
Outstanding as at December 31, 2020   1,693,063     6.11  
Granted   2,841,086     2.26  
Forfeited   (47,500 )   4.83  
Expired   (953,803 )   4.87  
Cancelled   (307,987 )   9.85  
Outstanding as at December 31, 2021   3,224,859     2.75  
Exercisable as at December 31, 2021   3,197,601     2.72  
Schedule of fair values of options granted using the Black-Scholes option pricing model
    2021     2020     2019  
Grant date share price   C$1.96 - C$2.85     C$3.75 - C$9.54     C$6.45 - C$75.38  
Exercise price   C$1.70 - C$4.25     C$3.68 - C$9.80     C$7.17 - C$75.38  
Expected dividend yield   -     -     -  
Risk free interest rate   0.34% - 1.10%     0.27% - 1.55%     1.24% - 1.90%  
Expected life   2 - 6 years     4 - 9 years     5 years  
Expected volatility   116% - 132%     120%     100%  
Schedule of number and weighted average remaining contractual life of outstanding and exercisable share options

The following table is a summary of the Company's share options outstanding as at December 31, 2021:

  Options outstanding     Options exercisable  
              Weighted average              
              remaining contractual              
  Exercise price     Number outstanding     life [years]     Exercise price     Number exercisable  
  C$     #     #     C$     #  
  1.70     154,953     3.46     1.70     154,953  
  2.91     5,150     4.00     2.91     5,150  
  2.25     2,559,995     2.42     2.25     2,559,995  
  2.61     12,684     1.49     2.61     12,683  
  3.75     10,500     3.92     3.75     6,500  
  3.86     256,245     3.21     3.86     252,993  
  4.42     99,503     0.71     4.42     99,502  
  4.75     15,000     3.29     4.75     15,000  
  5.43     16,265     1.49     5.43     16,264  
  7.63     50,000     4.00     7.63     30,000  
  10.65     3,731     1.49     10.65     3,730  
  13.07     10,856     1.49     13.07     10,855  
  13.47     1,418     1.49     13.47     1,418  
  16.08     18,410     1.49     16.08     18,409  
  17.89     4,178     1.49     17.89     4,178  
  18.09     2,488     1.24     18.09     2,488  
  50.25     3,483     2.28     50.25     3,483  
  2.75     3,224,859     2.50     2.72     3,197,601  

 

The following table is a summary of the Company's share options outstanding as at December 31, 2020:

  Options outstanding     Options exercisable  
              Weighted average              
              remaining contractual              
  Exercise price     Number outstanding     life [years]     Exercise price     Number exercisable  
  C$     #     #     C$     #  
  2.61     12,683     2.49     2.61     12,683  
  3.75     5,500     6.47     3.75     500  
  3.86     872,139     4.08     3.86     864,139  
  4.42     99,502     1.71     4.42     99,502  
  4.75     110,000     4.29     4.75     77,500  
  5.03     60,000     4.70     5.03     7,498  
  5.43     16,264     2.49     5.43     16,264  
  6.16     20,000     3.18     6.16     20,000  
  7.17     199,005     3.83     7.17     199,005  
  7.63     203,750     4.34     7.63     138,750  
  9.54     15,000     4.06     9.54     13,125  
  10.65     3,730     2.49     10.65     3,730  
  13.07     10,855     2.49     13.07     10,855  
  13.47     1,418     2.49     13.47     1,418  
  16.08     18,409     2.49     16.08     18,409  
  17.89     4,178     2.49     17.89     4,178  
  18.09     17,413     2.21     18.09     17,413  
  20.10     8,289     2.27     20.10     8,289  
  47.24     1,493     3.37     47.24     1,493  
  50.25     5,224     3.31     50.25     5,224  
  52.26     498     3.21     52.26     498  
  55.28     498     3.12     55.28     498  
  59.30     498     2.96     59.30     498  
  75.38     498     3.04     75.38     498  
  86.43     1,244     2.87     86.43     1,244  
  142.71     4,975     2.74     142.71     4,975  
  6.11     1,693,063     3.88     6.13     1,528,186  

 

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

  Options outstanding     Options exercisable  
              Weighted average              
              remaining contractual              
  Exercise price     Number outstanding     life [years]     Exercise price     Number exercisable  
  C$     #     #     C$     #  
  2.61     35,065     3.49     2.61     35,065  
  4.42     99,502     2.71     4.42     99,502  
  5.43     16,264     3.49     5.43     16,264  
  10.65     3,730     3.49     10.65     3,730  
  13.07     10,855     3.49     13.07     10,855  
  13.47     1,418     3.49     13.47     1,418  
  16.08     18,409     3.49     16.08     18,409  
  17.89     4,178     3.49     17.89     4,178  
  18.09     37,313     3.34     18.09     37,313  
  20.10     493,363     4.72     20.10     493,363  
  21.11     12,438     4.67     21.11     12,438  
  24.12     9,950     4.59     24.12     6,219  
  26.13     14,925     3.62     26.13     14,925  
  40.20     29,851     4.45     40.20     22,388  
  44.22     2,488     3.41     44.22     2,488  
  47.24     1,493     4.37     47.24     1,493  
  50.25     227,861     5.09     50.25     129,353  
  52.26     498     4.21     52.26     498  
  55.28     498     4.12     55.28     498  
  59.30     498     3.96     59.30     498  
  7.17     199,005     4.83     7.17     199,005  
  75.38     498     4.04     75.38     498  
  7.63     203,750     5.34     7.63     58,750  
  86.43     1,244     3.88     86.43     1,244  
  88.44     14,925     3.87     88.44     14,925  
  120.60     9,950     3.71     120.60     9,950  
  142.71     4,974     3.74     142.71     4,975  
  21.96     1,454,943     4.59     21.24     1,200,242  
Schedule of share-based compensation
    For the year ended December 31  
    2021     2020     2019  
    $     $     $  
Share options   3,594,005     2,825,863     10,780,853  
Warrants   98,513     -     -  
Class B Common Shares issued for services   174,537     -     -  
Class B Common Shares issued for compensation   3,576,875     5,226,148     1,302,077  
    7,443,930     8,052,011     12,082,930