Common Shares - Summary Of Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Common Shares
Number of options, beginning of period (in shares)	1,367,000	1,437,000
Granted, Number of options (in shares)		50,000
Number of options, Exercised (in shares)		(50,000)
Number of options, Cancelled/Forfeited (in shares)		(70,000)
Number of options, end of period (in shares)	1,367,000	1,367,000	1,437,000
Number of options, Exercisable (in shares)	1,367,000
Weighted average exercise price per option, beginning of period (in dollars per share)	$ 0.71	$ 0.73
Weighted average exercise price per option, Granted (in dollars per share)		0.51
Weighted average exercise price per option, Exercised (in dollars per share)		0.75
Weighted average exercise price per option, Cancelled/Forfeited (in dollars per share)		1.02
Weighted average exercise price per option, end of period (in dollars per share)	0.71	$ 0.71	$ 0.73
Weighted average exercise price, Exercisable (in dollars per share)	$ 0.71
Weighted average remaining contractual term, Outstanding	2 years 1 month 20 days	2 years 7 months 17 days	3 years 5 months 26 days
Weighted average remaining contractual term, Exercisable	2 years 1 month 20 days
Aggregate intrinsic value, Outstanding, beginning of period (in dollars)	$ 507	$ 35
Aggregate intrinsic value, Exercised (in dollars)		$ 9
Aggregate intrinsic value, Cancelled/Forfeited (in dollars)		$ 0
Aggregate intrinsic value, Outstanding, end of period (in dollars)	712	$ 507	$ 35
Aggregate intrinsic value, Options, Exercisable	$ 712