Stock-based Payments - Additional Information (Detail) - CAD ($) |
12 Months Ended | ||
|---|---|---|---|
Jun. 28, 2017 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Disclosure of terms and conditions of share-based payment arrangement [line items] | |||
| Percentage of maximum number of options that may be granted relative to total common shares outstanding | 10.00% | ||
| Weighted average share price | $ 3.66 | $ 0.52 | |
| Vesting description | These options shall expire at the earlier of 180 days of the death, disability or incapacity of the holder or five years after the date of issue, and can only be settled in equity. | ||
| Options expire period | 5 years | ||
| Weighted average exercise price of options outstanding | $ 2.05 | 1.10 | |
| Weighted average exercise price of options exercisable | 1.71 | 1.09 | |
| Stock-based compensation | $ 1,862,000 | $ 307,000 | |
| Death, disability and Incapacity of Holder [member] | |||
| Disclosure of terms and conditions of share-based payment arrangement [line items] | |||
| Options expire period | 180 days | ||