Intangible Assets and Goodwill - Summary of Key Assumptions Used in Estimation of Receivable Amounts of CGU (Detail) |
12 Months Ended |
|---|---|
Dec. 31, 2017 | |
| OGBC [member] | |
| Disclosure of information for cash-generating units [line items] | |
| Weighted average cost of capital (after-tax) | 37.00% |
| Average growth rate determined by summing the expected year over year growth rate in EBITDA then dividing by five years | 490.00% |
| Peace Naturals [member] | |
| Disclosure of information for cash-generating units [line items] | |
| Weighted average cost of capital (after-tax) | 36.00% |
| Average growth rate determined by summing the expected year over year growth rate in EBITDA then dividing by five years | 140.00% |