Stock-based Payments - Summary of Outstanding and Exercisable Options (Detail)
|
12 Months Ended |
|
|
|
Dec. 31, 2017
CAD ($)
yr
|
Dec. 31, 2016
CAD ($)
|
Dec. 31, 2015 |
| Disclosure of terms and conditions of share-based payment arrangement [line items] |
|
|
|
| Number of options |
11,603,750
|
6,177,594
|
1,610,003
|
| Number of options, Exercisable |
2,744,387
|
|
|
| Weighted average exercise price | $ |
$ 2.05
|
$ 1.10
|
|
| Weighted average exercise price, Exercisable | $ |
$ 1.71
|
$ 1.09
|
|
| Weighted average remaining contractual life (years) | yr |
4.05
|
|
|
| Weighted average remaining contractual life (years), Exercisable | yr |
3.57
|
|
|
| August 2016 [member] |
|
|
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] |
|
|
|
| Vested terms of options |
Evenly over 48 months
|
|
|
| Number of options |
1,141,666
|
|
|
| Weighted average exercise price | $ |
$ 0.50
|
|
|
| Weighted average remaining contractual life (years) | yr |
3.60
|
|
|
| October 2016 [member] |
|
|
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] |
|
|
|
| Vested terms of options |
Evenly over 48 months
|
|
|
| Number of options |
3,578,084
|
|
|
| Weighted average exercise price | $ |
$ 1.23
|
|
|
| Weighted average remaining contractual life (years) | yr |
3.77
|
|
|
| November 2016 [member] |
|
|
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] |
|
|
|
| Vested terms of options |
On May 15, 2017
|
|
|
| Number of options |
300,000
|
|
|
| Weighted average exercise price | $ |
$ 1.50
|
|
|
| Weighted average remaining contractual life (years) | yr |
0.37
|
|
|
| November 2016 [member] |
|
|
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] |
|
|
|
| Vested terms of options |
Evenly over 48 months
|
|
|
| Number of options |
182,000
|
|
|
| Weighted average exercise price | $ |
$ 1.84
|
|
|
| Weighted average remaining contractual life (years) | yr |
3.88
|
|
|
| April 2017 [member] |
|
|
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] |
|
|
|
| Vested terms of options |
Evenly over 48 months
|
|
|
| Number of options |
3,299,000
|
|
|
| Weighted average exercise price | $ |
$ 3.14
|
|
|
| Weighted average remaining contractual life (years) | yr |
4.28
|
|
|
| August 2017 [member] |
|
|
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] |
|
|
|
| Vested terms of options |
Evenly over 48 months
|
|
|
| Number of options |
2,903,000
|
|
|
| Weighted average exercise price | $ |
$ 2.42
|
|
|
| Weighted average remaining contractual life (years) | yr |
4.65
|
|
|
| November 2017 [member] |
|
|
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] |
|
|
|
| Vested terms of options |
Evenly over 48 months
|
|
|
| Number of options |
200,000
|
|
|
| Weighted average exercise price | $ |
$ 3.32
|
|
|
| Weighted average remaining contractual life (years) | yr |
4.86
|
|
|