Condensed Consolidated Statements of Shareholders' Equity (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 Other Comprehensive Loss	Accumulated Deficit
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
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
Exercise of stock options	205		$ 332		(127)
Exercise of stock options, Shares			44,268
Share-based compensation expense	4,745				4,745
Net loss and comprehensive loss	(38,093)							(38,093)
Balance at Jun. 30, 2022	225,517		$ 481,380		27,253			(283,116)
Balance, Shares at Jun. 30, 2022			41,923,472
Exercise of stock options	50		$ 80		(30)
Exercise of stock options, Shares			16,930
Share-based compensation expense	5,053				5,053
Issuance of common shares under the 2020 Employee Share Purchase Plan		219		$ 322		(103)
Issuance of common shares under the 2020 Employee Share Purchase Plan, Shares				21,108
Other comprehensive gain (loss)	(524)						$ (524)
Net income (loss)	75,461							75,461
Balance at Sep. 30, 2022	305,776		$ 481,782		32,173		(524)	(207,655)
Balance, Shares at Sep. 30, 2022			41,961,510
Balance at Dec. 31, 2022	279,517		$ 482,032		37,226		(428)	(239,313)
Balance, Shares at Dec. 31, 2022			42,036,193
Exercise of stock options	4		$ 7		(3)
Exercise of stock options, Shares			2,000
Share-based compensation expense	6,062				6,062
Issuance of common shares under the 2020 Employee Share Purchase Plan		409		$ 638		(229)
Issuance of common shares under the 2020 Employee Share Purchase Plan, Shares				41,703
Other comprehensive gain (loss)	193						193
Net income (loss)	(34,941)							(34,941)
Balance at Mar. 31, 2023	251,244		$ 482,677		43,056		(235)	(274,254)
Balance, Shares at Mar. 31, 2023			42,079,896
Balance at Dec. 31, 2022	$ 279,517		$ 482,032		37,226		(428)	(239,313)
Balance, Shares at Dec. 31, 2022			42,036,193
Exercise of stock options, Shares	17,450
Balance at Sep. 30, 2023	$ 233,368		$ 483,184		55,515		(252)	(305,079)
Balance, Shares at Sep. 30, 2023			42,129,251
Balance at Mar. 31, 2023	251,244		$ 482,677		43,056		(235)	(274,254)
Balance, Shares at Mar. 31, 2023			42,079,896
Exercise of stock options	40		$ 62		(22)
Exercise of stock options, Shares			14,050
Share-based compensation expense	6,265				6,265
Other comprehensive gain (loss)	(189)						(189)
Net income (loss)	(11,946)							(11,946)
Balance at Jun. 30, 2023	245,414		$ 482,739		49,299		(424)	(286,200)
Balance, Shares at Jun. 30, 2023			42,093,946
Exercise of stock options	4		$ 6		(2)
Exercise of stock options, Shares			1,400
Share-based compensation expense	6,377				6,377
Issuance of common shares under the 2020 Employee Share Purchase Plan		$ 280		$ 439		$ (159)
Issuance of common shares under the 2020 Employee Share Purchase Plan, Shares				33,905
Other comprehensive gain (loss)	172						172
Net income (loss)	(18,879)							(18,879)
Balance at Sep. 30, 2023	$ 233,368		$ 483,184		$ 55,515		$ (252)	$ (305,079)
Balance, Shares at Sep. 30, 2023			42,129,251