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Common Shares - Summary Of Deferred Share Units Activity (Details) $ / shares in Units, $ in Thousands	1 Months Ended		3 Months Ended		9 Months Ended		12 Months Ended
	Feb. 28, 2021 USD ($) shares	Mar. 31, 2020 USD ($) shares	Sep. 30, 2021 USD ($) $ / shares shares	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) $ / shares shares	Sep. 30, 2020 USD ($) $ / shares shares	Dec. 31, 2020 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense | $			$ 143	$ 165	$ 727	$ 757
Deferred Stock Units (DSU) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common shares issues for each DSU (at end of board members' team).					1
Unvested, Number of units, beginning of period (in shares) | shares					726,000	366,000	366,000
Granted, Number of units (in shares) | shares	204,000	360,000			204,000		360,000
Unvested, Number of units, end of period (in shares) | shares			930,000		930,000		726,000
Unvested, weighted average fair value, beginning of period (in dollars per share) | $ / shares					$ 0.57	$ 0.57	$ 0.57
Granted, Weighted average fair value (in dollars per share) | $ / shares					1.04		0.58
Unvested, weighted average fair value, end of period (in dollars per share) | $ / shares			$ 0.68		$ 0.68		$ 0.57
Allocated Share-based Compensation Expense | $	$ 212	$ 209			$ 212	$ 209

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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