Deferred income Taxes - Schedule of Non-capital and Farm Losses Expire (Detail) $ in Thousands | 12 Months Ended |
Dec. 31, 2018USD ($) |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | $ 85,254 |
Canada [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 385 |
United States [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 84,869 |
2021 [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 8,402 |
2021 [member] | United States [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 8,402 |
2022 [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 5,043 |
2022 [member] | United States [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 5,043 |
2023 [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 5,117 |
2023 [member] | United States [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 5,117 |
2024 [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 4,015 |
2024 [member] | United States [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 4,015 |
2025 [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 8,757 |
2025 [member] | United States [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 8,757 |
2027 [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 25 |
2027 [member] | Canada [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 25 |
2028 [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 4 |
2028 [member] | Canada [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 4 |
2029 [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 89 |
2029 [member] | Canada [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 25 |
2029 [member] | United States [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 64 |
2030 [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 7 |
2030 [member] | Canada [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 7 |
2031 [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 992 |
2031 [member] | Canada [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 4 |
2031 [member] | United States [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 988 |
2032 [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 14,899 |
2032 [member] | Canada [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 4 |
2032 [member] | United States [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 14,895 |
2033 [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 4 |
2033 [member] | Canada [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 4 |
2034 [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 11,669 |
2034 [member] | Canada [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 4 |
2034 [member] | United States [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 11,665 |
2035 [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 7,553 |
2035 [member] | Canada [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 108 |
2035 [member] | United States [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 7,445 |
2036 [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 3,681 |
2036 [member] | Canada [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 98 |
2036 [member] | United States [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 3,583 |
2037 [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 5,668 |
2037 [member] | Canada [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 98 |
2037 [member] | United States [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 5,570 |
2038 [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 9,329 |
2038 [member] | Canada [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | 4 |
2038 [member] | United States [member] | |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |
Unused Non Capital And Farm Losses | $ 9,325 |