Commitments and contingencies - Summary of Minimum Operating Lease Obligations for Its Premises Due in Future Fiscal Years (Detail)
$ in Thousands |
Dec. 31, 2017
CAD ($)
|
| Disclosure of maturity analysis of operating lease payments [line items] |
|
| Minimum operating lease obligations |
$ 456
|
| 2018 [member] |
|
| Disclosure of maturity analysis of operating lease payments [line items] |
|
| Minimum operating lease obligations |
81
|
| 2019 [member] |
|
| Disclosure of maturity analysis of operating lease payments [line items] |
|
| Minimum operating lease obligations |
88
|
| 2020 [member] |
|
| Disclosure of maturity analysis of operating lease payments [line items] |
|
| Minimum operating lease obligations |
92
|
| 2021 [member] |
|
| Disclosure of maturity analysis of operating lease payments [line items] |
|
| Minimum operating lease obligations |
92
|
| 2022 [member] |
|
| Disclosure of maturity analysis of operating lease payments [line items] |
|
| Minimum operating lease obligations |
95
|
| Later Than Five Years And Thereafter [Member] |
|
| Disclosure of maturity analysis of operating lease payments [line items] |
|
| Minimum operating lease obligations |
$ 8
|