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Financial risks (Tables) | 12 Months Ended
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Dec. 31, 2019
Financial Risk Management [Abstract] |
Disclosure of detailed information about foreign currency risk [Table Text Block] |
|  | December 31, |
|  | 2019 |  |  | 2018 |
|  | $ |  |  | $ |
Cash and cash equivalents |  | 46,267 |  |  | 38,677 |
Amounts receivable |  | - |  |  | 1,011 |
Other assets |  | 567 |  |  | 641 |
Accounts payable and accrued liabilities |  | (86 | ) |  | (22 | )
Revolving credit facility |  | (15,000 | ) |  | - |
Net exposure, in US dollars |  | 31,748 |  |  | 40,307 |
Equivalent in Canadian dollars |  | 41,234 |  |  | 54,987 |
Disclosure of detailed information about financial instruments [Table Text Block] |
| As at December 31, 2019
| Amount payable |  | Estimated annual payments
| at maturity | Maturity | 2020 | 2021 | 2022 | 2023 | 2024 | 2025-2029
| $ |  | $ | $ | $ | $ | $ |
Conv. debenture (2016) | 50,000 | February 12, 2021 | 2,005 | 50,236 | - | - | - | -
Conv. debentures (2018) | 300,000 | December 31, 2022 | 12,000 | 12,000 | 312,000 | - | - | -
Lease liabilities | 10,126 | December 31, 2029 | 1,256 | 1,256 | 1,256 | 1,261 | 1,284 | 6,422
Revolving credit facility(i) | 19,482 | November 14, 2023 | 2,630 | 2,630 | 2,630 | 21,773 | - | -
| 379,608 |  | 17,891 | 66,122 | 315,886 | 23,034 | 1,284 | 6,422
(i) The interest payable is based on the actual interest rate as at December 31, 2019.

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