Common Shares - Summary Of Deferred Share Units Activity (Details) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended	12 Months Ended
Feb. 28, 2021 USD ($) shares	Mar. 31, 2020 USD ($) shares	Mar. 31, 2021 USD ($) $ / shares shares	Mar. 31, 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 \| $			$ 421	$ 390
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		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		$ 0.57
Allocated Share-based Compensation Expense \| $	$ 212	$ 209	$ 212	$ 209

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

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