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Additional Cash Flow Disclosures
 12 Months Ended
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 receivables1,979,111 (2,017,122)(13,924)
Prepaid expenses286,391 (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 exchange35,710 78,708 14,531 
Change in non-cash working capital related to operating activities209,779 (1,795,777)3,904,339 

Other Cash Flow Disclosures
2020
$		2019
$		2018
$
Cash interest received189,720 274,094 173,496 
Cash taxes paid12,080 5,448 15,728