| Interest and other financial costs |
| | 2021 | | | 2020 | | Interest on long-term debt | | $ | 32,718 | | | $ | 19,185 | | Accretion expense | | | 16,937 | | | | 9,387 | | Loss (gain) on revaluation of foreign exchange contracts | | | - | | | | (70,427 | ) | | | $ | 49,655 | | | $ | (41,855 | ) |
| | 2021 | | | 2020 | | Interest on long-term debt | | $ | 74,832 | | | $ | 57,917 | | Accretion expense | | | 38,512 | | | | 27,044 | | Loss (gain) on revaluation of foreign exchange contracts | | | - | | | | (58,945 | ) | | | $ | 113,344 | | | $ | 26,016 | |
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