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Additional Cash Flow Disclosures | 12 Months Ended
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Dec. 31, 2020
Statement of cash flows [abstract] |
Additional Cash Flow Disclosures | Additional Cash Flow Disclosures Net Change In Non-Cash Working Capital
| 2020 $ | 2019 $ | 2018 $
Change in: |  |  |
Contract receivable | — |  | — |  | 4,767,100 |
Other receivables | 1,979,111 |  | (2,017,122) |  | (13,924) |
Prepaid expenses | 286,391 |  | (2,012,605) |  | 475,077 |
Accounts payable and accrued liabilities | (1,368,203) |  | 1,347,365 |  | (1,858,170) |
Contract liability | — |  | — |  | 547,707 |
Other liabilities | (723,230) |  | 807,877 |  | (27,982) |
Non-cash impact of foreign exchange | 35,710 |  | 78,708 |  | 14,531 |
Change in non-cash working capital related to operating activities | 209,779 |  | (1,795,777) |  | 3,904,339 |
Other Cash Flow Disclosures
| 2020 $ | 2019 $ | 2018 $
Cash interest received | 189,720 |  | 274,094 |  | 173,496 |
Cash taxes paid | 12,080 |  | 5,448 |  | 15,728 |

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