Condensed Consolidated Statements of Convertible Preferred Shares and Shareholders' Equity (Deficit) (Unaudited) - USD ($) $ in Thousands	Total	2020 Employee Share Purchase Plan	Common Shares	Common Shares 2020 Employee Share Purchase Plan	Additional Paid-in Capital	Additional Paid-in Capital 2020 Employee Share Purchase Plan	Accumulated Deficit
Balance at Dec. 31, 2020	$ 286,830		$ 384,313		$ 5,875		$ (103,358)
Balance, Shares at Dec. 31, 2020			36,902,924
Exercise of stock options	183		$ 297		(114)
Exercise of stock options, Shares			87,786
Share-based compensation expense	2,057				2,057
Net loss and comprehensive loss	(21,417)						(21,417)
Balance at Mar. 31, 2021	267,653		$ 384,610		7,818		(124,775)
Balance, Shares at Mar. 31, 2021			36,990,710
Balance at Dec. 31, 2021	288,421		$ 480,699		17,988		(210,266)
Balance, Shares at Dec. 31, 2021			41,850,162
Exercise of stock options	$ 28		$ 46		(18)
Exercise of stock options, Shares	12,235		12,235
Share-based compensation expense	$ 4,755				4,755
Issuance of common shares under the 2020 Employee Share Purchase Plan		$ 213		$ 303		$ (90)
Issuance of common shares under the 2020 Employee Share Purchase Plan, Shares		16,807
Net loss and comprehensive loss	(34,757)						(34,757)
Balance at Mar. 31, 2022	$ 258,660		$ 481,048		$ 22,635		$ (245,023)
Balance, Shares at Mar. 31, 2022			41,879,204