Share Capital - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Number of Options Outstanding, Beginning balance		4,758,997	3,534,236
Number of Options, Granted		1,775,450	1,482,250
Number of Options, Exercised	[1]	(690,284)	(171,812)
Number of Options, Forfeited, cancelled or expired		(205,931)	(85,677)
Number of Options Outstanding, Ending balance		5,638,232	4,758,997
Number of Options Exercisable, End of period		2,966,643
Weighted Average Exercise Price Outstanding, Beginning balance	[2]	$ 9.10	$ 7.90
Weighted Average Exercise Price, Granted	[2]	19.82	11.75
Weighted Average Exercise Price, Exercised	[1],[2]	7.34	5.76
Weighted Average Exercise Price, Forfeited, cancelled and expired	[2]	13.01	13.04
Weighted Average Exercise Price Outstanding, Ending balance	[2]	12.55	$ 9.10
Weighted Average Exercise Price, Exercisable Ending balance	[2]	$ 8.85
Aggregate Intrinsic Value, Outstanding		$ 105,405	$ 30,464	$ 19,618
Aggregate Intrinsic Value, Exercised	[1]	11,306	$ 1,535
Aggregate Intrinsic Value, Exercisable, Ending balance		$ 66,418

[1] During the year ended December 31, 2021, 66,215 (2020 – 26,513) stock options were exercised for the same number of common shares in exchange for cash. In the same period, the Company issued 412,940 (2020 – 87,197) common shares for the cashless exercise of 624,069 (2020 – 145,299) stock options.

[2] Canadian dollar denominated stock options have been translated into U.S. dollars at a foreign exchange rate of 0.79 as of December 31, 2021.