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Other long term obligations (Tables) | 12 Months Ended
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Dec. 31, 2020
Other Liabilities Disclosure [Abstract] |
Schedule of other long term obligations |
| Note |  | December 31, 2020 |  | December 31, 2019
Directors' deferred stock unit plan | 17(c) |  | $ | 10,761 |  |  | $ | 14,375 |
Deferred gain on sale-leaseback | 13(a) |  | 4,748 |  |  | 6,593 |
Other |  |  | 3,341 |  |  | 3,536 |
|  |  | $ | 18,850 |  |  | $ | 24,504 |
Schedule of deferred gain on sale-leaseback |
|  | December 31, 2020 |  | December 31, 2019
Balance, beginning of year |  | $ | 6,593 |  |  | $ | 8,438 |
Amortization of deferred gain on sale-leaseback |  | (1,845) |  |  | (1,845) |
Balance, end of year |  | $ | 4,748 |  |  | $ | 6,593 |

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