Share Capital - Summary of Weighted-Average Remaining Contractual Life and Weighted-Average Exercise Price Options Outstanding and Options Exercisable on Exercise Prices (Detail)
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9 Months Ended |
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Sep. 30, 2019
shares
$ / shares
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Sep. 30, 2019
shares
$ / shares
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Dec. 31, 2018
shares
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Dec. 31, 2017
shares
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| Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |
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| Options Outstanding, Number Outstanding |
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1,715,079
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1,715,079
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| Weighted average remaining contractual life of outstanding share options |
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5 years 3 months 25 days
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| Options Outstanding, Options Exercisable |
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717,613
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717,613
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| Canadian Dollar [Member] |
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| Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |
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| Options Outstanding, Number Outstanding |
[1] |
861,037
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861,037
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875,433
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591,609
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| Weighted average remaining contractual life of outstanding share options |
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4 years 4 months 13 days
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| Options Outstanding, Options Exercisable |
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467,826
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467,826
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| Canadian Dollar [Member] | $3.28 [member] |
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| Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |
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| Exercise prices/option | $ / shares |
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$ 3.28
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| Options Outstanding, Number Outstanding |
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31,498
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31,498
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| Weighted average remaining contractual life of outstanding share options |
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5 years 11 months 1 day
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| Options Outstanding, Options Exercisable |
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31,498
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31,498
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| Canadian Dollar [Member] | $4.50 [member] |
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| Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |
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| Exercise prices/option | $ / shares |
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$ 4.50
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| Options Outstanding, Number Outstanding |
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18,936
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18,936
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| Weighted average remaining contractual life of outstanding share options |
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3 years 6 months 10 days
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| Options Outstanding, Options Exercisable |
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18,936
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18,936
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| Canadian Dollar [Member] | $4.54 [member] |
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| Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |
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| Exercise prices/option | $ / shares |
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$ 4.54
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| Options Outstanding, Number Outstanding |
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743,122
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743,122
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| Weighted average remaining contractual life of outstanding share options |
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7 years 1 month 27 days
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| Options Outstanding, Options Exercisable |
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349,909
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349,909
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| Canadian Dollar [Member] | $4.80 [member] |
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| Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |
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| Exercise prices/option | $ / shares |
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$ 4.80
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| Options Outstanding, Number Outstanding |
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3,040
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3,040
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| Weighted average remaining contractual life of outstanding share options |
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11 months 15 days
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| Options Outstanding, Options Exercisable |
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3,040
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3,040
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| Canadian Dollar [Member] | $7.49 [member] |
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| Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |
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| Exercise prices/option | $ / shares |
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$ 7.49
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| Options Outstanding, Number Outstanding |
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5,590
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5,590
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| Weighted average remaining contractual life of outstanding share options |
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5 years 9 months 7 days
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| Options Outstanding, Options Exercisable |
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5,590
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5,590
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| Canadian Dollar [Member] | $9.00 [member] |
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| Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |
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| Exercise prices/option | $ / shares |
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$ 9.00
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| Options Outstanding, Number Outstanding |
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11,481
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11,481
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| Weighted average remaining contractual life of outstanding share options |
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5 years 9 months 7 days
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| Options Outstanding, Options Exercisable |
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11,481
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11,481
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| Canadian Dollar [Member] | $9.60 [member] |
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| Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |
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| Exercise prices/option | $ / shares |
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$ 9.60
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| Options Outstanding, Number Outstanding |
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1,105
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1,105
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| Weighted average remaining contractual life of outstanding share options |
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1 year 7 days
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| Options Outstanding, Options Exercisable |
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1,105
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1,105
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| Canadian Dollar [Member] | $11.70 [member] |
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| Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |
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| Exercise prices/option | $ / shares |
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$ 11.70
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| Options Outstanding, Number Outstanding |
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6,667
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6,667
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| Weighted average remaining contractual life of outstanding share options |
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1 year 2 months 8 days
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| Options Outstanding, Options Exercisable |
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6,667
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6,667
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| Canadian Dollar [Member] | $12.00 [member] |
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| Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |
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| Exercise prices/option | $ / shares |
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$ 12.00
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| Options Outstanding, Number Outstanding |
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1,948
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1,948
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| Weighted average remaining contractual life of outstanding share options |
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1 year 2 months 4 days
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| Options Outstanding, Options Exercisable |
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1,948
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1,948
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| Canadian Dollar [Member] | $30.00 [member] |
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| Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |
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| Exercise prices/option | $ / shares |
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$ 30.00
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| Options Outstanding, Number Outstanding |
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28,260
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28,260
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| Weighted average remaining contractual life of outstanding share options |
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1 year 10 months 24 days
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| Options Outstanding, Options Exercisable |
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28,260
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28,260
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| Canadian Dollar [Member] | $30.60 [member] |
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| Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |
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| Exercise prices/option | $ / shares |
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$ 30.60
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| Options Outstanding, Number Outstanding |
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2,096
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2,096
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| Weighted average remaining contractual life of outstanding share options |
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1 year 2 months 23 days
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| Options Outstanding, Options Exercisable |
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2,096
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2,096
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| Canadian Dollar [Member] | $32.40 [member] |
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| Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |
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| Exercise prices/option | $ / shares |
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$ 32.40
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| Options Outstanding, Number Outstanding |
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810
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810
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| Weighted average remaining contractual life of outstanding share options |
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1 year 3 months 29 days
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| Options Outstanding, Options Exercisable |
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810
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810
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| Canadian Dollar [Member] | $41.70 [member] |
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| Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |
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| Exercise prices/option | $ / shares |
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$ 41.70
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| Options Outstanding, Number Outstanding |
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658
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658
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| Weighted average remaining contractual life of outstanding share options |
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2 months 15 days
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| Options Outstanding, Options Exercisable |
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658
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658
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| Canadian Dollar [Member] | $45.30 [member] |
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| Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |
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| Exercise prices/option | $ / shares |
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$ 45.30
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| Options Outstanding, Number Outstanding |
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560
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560
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| Weighted average remaining contractual life of outstanding share options |
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10 months 13 days
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| Options Outstanding, Options Exercisable |
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560
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560
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| Canadian Dollar [Member] | $51.60 [member] |
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| Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |
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| Exercise prices/option | $ / shares |
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$ 51.60
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| Options Outstanding, Number Outstanding |
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5,266
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5,266
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| Weighted average remaining contractual life of outstanding share options |
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8 months 8 days
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| Options Outstanding, Options Exercisable |
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5,268
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5,268
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| US Dollar [Member] |
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| Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |
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| Options Outstanding, Number Outstanding |
[1] |
854,042
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854,042
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50,349
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| Weighted average remaining contractual life of outstanding share options |
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6 years 3 months 10 days
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| Options Outstanding, Options Exercisable |
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249,787
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249,787
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| US Dollar [Member] | $1.55 [member] |
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| Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |
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| Exercise prices/option | $ / shares |
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$ 1.55
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| Options Outstanding, Number Outstanding |
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50,349
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50,349
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| Weighted average remaining contractual life of outstanding share options |
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2 years 2 months 19 days
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| Options Outstanding, Options Exercisable |
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50,349
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50,349
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| US Dollar [Member] | $2.20 [member] |
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| Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |
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| Exercise prices/option | $ / shares |
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$ 2.20
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| Options Outstanding, Number Outstanding |
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469,420
|
469,420
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| Weighted average remaining contractual life of outstanding share options |
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6 years 9 months 14 days
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| Options Outstanding, Options Exercisable |
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2,165
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2,165
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| US Dollar [Member] | $3.40 [member] |
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| Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |
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| Exercise prices/option | $ / shares |
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$ 3.40
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| Options Outstanding, Number Outstanding |
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294,273
|
294,273
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|
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| Weighted average remaining contractual life of outstanding share options |
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6 years 7 months 13 days
|
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| Options Outstanding, Options Exercisable |
|
197,273
|
197,273
|
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| US Dollar [Member] | $3.72 [member] |
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| Disclosure of number and weighted average remaining contractual life of outstanding share options [line items] |
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| Exercise prices/option | $ / shares |
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$ 3.72
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| Options Outstanding, Number Outstanding |
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40,000
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40,000
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| Weighted average remaining contractual life of outstanding share options |
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2 years 11 months 12 days
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