Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Total
Balance at the beginning of period at Dec. 31, 2020	$ 4	$ 391,558	$ (526)	$ (285,200)	$ 105,836
Balance at the beginning of period (in shares) at Dec. 31, 2020	40,688,447
Increase (Decrease) in Stockholders' Equity
Issuance of common stock to investors, net of issuance costs		107,725			107,725
Issuance of common stock to investors, net of issuance costs (in shares)	2,804,878
Exercise of stock options		110			110
Exercise of stock options (in shares)	46,000
Stock-based compensation expense		4,698			4,698
Stock-based compensation expense (in shares)	9,094
Foreign currency translation			435		435
Net loss				33,413	33,413
Balance at the end of period at Mar. 31, 2021	$ 4	504,091	(91)	(251,787)	252,217
Balance at the end of period (in shares) at Mar. 31, 2021	43,548,419
Balance at the beginning of period at Dec. 31, 2020	$ 4	391,558	(526)	(285,200)	105,836
Balance at the beginning of period (in shares) at Dec. 31, 2020	40,688,447
Increase (Decrease) in Stockholders' Equity
Net loss					(18,382)
Balance at the end of period at Sep. 30, 2021	$ 4	514,198	225	(303,582)	210,845
Balance at the end of period (in shares) at Sep. 30, 2021	43,643,916
Balance at the beginning of period at Mar. 31, 2021	$ 4	504,091	(91)	(251,787)	252,217
Balance at the beginning of period (in shares) at Mar. 31, 2021	43,548,419
Increase (Decrease) in Stockholders' Equity
Exercise of stock options		131			131
Exercise of stock options (in shares)	28,332
Stock-based compensation expense		4,827			4,827
Stock-based compensation expense (in shares)	199
Foreign currency translation			78		78
Net loss				(22,937)	(22,937)
Balance at the end of period at Jun. 30, 2021	$ 4	509,049	(13)	(274,724)	234,316
Balance at the end of period (in shares) at Jun. 30, 2021	43,576,950
Increase (Decrease) in Stockholders' Equity
Exercise of stock options		248			248
Exercise of stock options (in shares)	66,160
Stock-based compensation expense		4,901			4,901
Stock-based compensation expense (in shares)	806
Foreign currency translation			238		238
Net loss				(28,858)	(28,858)
Balance at the end of period at Sep. 30, 2021	$ 4	514,198	225	(303,582)	210,845
Balance at the end of period (in shares) at Sep. 30, 2021	43,643,916
Balance at the beginning of period at Dec. 31, 2021	$ 4	519,206	1,371	(340,475)	$ 180,106
Balance at the beginning of period (in shares) at Dec. 31, 2021	43,694,716				43,694,716
Increase (Decrease) in Stockholders' Equity
Exercise of stock options		32			$ 32
Exercise of stock options (in shares)	16,000
Stock-based compensation expense		5,091			5,091
Stock-based compensation expense (in shares)	7,449
Foreign currency translation			311		311
Net loss				(28,068)	(28,068)
Balance at the end of period at Mar. 31, 2022	$ 4	524,329	1,682	(368,543)	157,472
Balance at the end of period (in shares) at Mar. 31, 2022	43,718,165
Balance at the beginning of period at Dec. 31, 2021	$ 4	519,206	1,371	(340,475)	$ 180,106
Balance at the beginning of period (in shares) at Dec. 31, 2021	43,694,716				43,694,716
Increase (Decrease) in Stockholders' Equity
Exercise of stock options (in shares)					20,000
Retirement of treasury shares - refer to Note 10					$ (963)
Net loss					(96,725)
Balance at the end of period at Sep. 30, 2022	$ 4	540,392	4,702	(437,200)	$ 107,898
Balance at the end of period (in shares) at Sep. 30, 2022	43,668,130				43,668,130
Balance at the beginning of period at Mar. 31, 2022	$ 4	524,329	1,682	(368,543)	$ 157,472
Balance at the beginning of period (in shares) at Mar. 31, 2022	43,718,165
Increase (Decrease) in Stockholders' Equity
Stock-based compensation expense		13,633			13,633
Stock-based compensation expense (in shares)	1,873
Foreign currency translation			1,422		1,422
Net loss				(41,131)	(41,131)
Balance at the end of period at Jun. 30, 2022	$ 4	537,962	3,104	(409,674)	131,396
Balance at the end of period (in shares) at Jun. 30, 2022	43,720,038
Increase (Decrease) in Stockholders' Equity
Exercise of stock options		52			52
Exercise of stock options (in shares)	4,000
Stock-based compensation expense		3,341			3,341
Stock-based compensation expense (in shares)	1,979
Retirement of treasury shares - refer to Note 10		(963)			(963)
Retirement of treasury shares - refer to Note 10 (in shares)	(57,887)
Foreign currency translation			1,598		1,598
Net loss				(27,526)	(27,526)
Balance at the end of period at Sep. 30, 2022	$ 4	$ 540,392	$ 4,702	$ (437,200)	$ 107,898
Balance at the end of period (in shares) at Sep. 30, 2022	43,668,130				43,668,130