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
	Mar. 31, 2020 USD ($) shares	May 31, 2019 USD ($) shares	Sep. 30, 2020 USD ($) $ / shares shares	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) $ / shares shares	Sep. 30, 2019 USD ($) $ / shares shares	Dec. 31, 2019 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense | $			$ 165	$ 148	$ 757	$ 615
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					366,000	0	0
Granted, Number of units (in shares) | shares	360,000	366,000			360,000		366,000
Unvested, Number of units, end of period (in shares) | shares			726,000		726,000		366,000
Unvested, weighted average fair value, beginning of year (in dollars per share) | $ / shares					$ 0.57	$ 0	$ 0
Granted, Weighted average fair value (in dollars per share) | $ / shares					0.58		0.57
Unvested, weighted average fair value, end of year (in dollars per share) | $ / shares			$ 0.57		$ 0.57		$ 0.57
Allocated Share-based Compensation Expense | $	$ 209	$ 209	$ 0		$ 209	$ 209