Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Ordinary Shares	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit	Total
Beginning balance at Dec. 31, 2020	$ 266	$ 249,947	$ (3,193)	$ (151,560)	$ 95,460
Beginning balance (in shares) at Dec. 31, 2020	21,094,557
Increase (decrease) in shareholders' equity (deficit)
Issuance of ADSs upon exercise of share options	$ 1	283			284
Issuance of ADSs upon exercise of share options (in shares)	63,545
Issuance of ADSs, net of commissions and offering expenses	$ 33	58,742			58,775
Issuance of ADSs, net of commissions and offering expenses (in shares)	2,358,485
Share-based compensation expense		3,821			3,821
Foreign currency translation adjustment			(58)		(58)
Net loss				(16,191)	(16,191)
Ending balance at Mar. 31, 2021	$ 300	312,793	(3,251)	(167,751)	142,091
Ending balance (in shares) at Mar. 31, 2021	23,516,587
Beginning balance at Dec. 31, 2020	$ 266	249,947	(3,193)	(151,560)	95,460
Beginning balance (in shares) at Dec. 31, 2020	21,094,557
Increase (decrease) in shareholders' equity (deficit)
Foreign currency translation adjustment					(313)
Net loss					(34,104)
Ending balance at Jun. 30, 2021	$ 309	330,911	(3,506)	(185,664)	142,050
Ending balance (in shares) at Jun. 30, 2021	24,124,552
Beginning balance at Mar. 31, 2021	$ 300	312,793	(3,251)	(167,751)	142,091
Beginning balance (in shares) at Mar. 31, 2021	23,516,587
Increase (decrease) in shareholders' equity (deficit)
Issuance of ADSs upon exercise of share options	$ 2	1,573			1,575
Issuance of ADSs upon exercise of share options (in shares)	125,666
Issuance of ADSs, net of commissions and offering expenses	$ 7	13,970			13,977
Issuance of ADSs, net of commissions and offering expenses (in shares)	482,299
Share-based compensation expense		2,575			2,575
Foreign currency translation adjustment			(255)		(255)
Net loss				(17,913)	(17,913)
Ending balance at Jun. 30, 2021	$ 309	330,911	(3,506)	(185,664)	142,050
Ending balance (in shares) at Jun. 30, 2021	24,124,552
Beginning balance at Dec. 31, 2021	$ 384	567,637	(3,388)	(218,379)	$ 346,254
Beginning balance (in shares) at Dec. 31, 2021	29,579,364				29,579,364
Increase (decrease) in shareholders' equity (deficit)
Issuance of ADSs upon exercise of share options	$ 1	449			$ 450
Issuance of ADSs upon exercise of share options (in shares)	30,074
Issuance of ADSs upon vesting of restricted share units (in shares)	35,000
Share-based compensation expense		10,198			10,198
Foreign currency translation adjustment			920		920
Net loss				(27,564)	(27,564)
Ending balance at Mar. 31, 2022	$ 385	578,284	(2,468)	(245,943)	330,258
Ending balance (in shares) at Mar. 31, 2022	29,644,438
Beginning balance at Dec. 31, 2021	$ 384	567,637	(3,388)	(218,379)	$ 346,254
Beginning balance (in shares) at Dec. 31, 2021	29,579,364				29,579,364
Increase (decrease) in shareholders' equity (deficit)
Foreign currency translation adjustment					$ 3,014
Net loss					(54,392)
Ending balance at Jun. 30, 2022	$ 385	584,152	(374)	(272,771)	$ 311,392
Ending balance (in shares) at Jun. 30, 2022	29,666,317				29,666,317
Beginning balance at Mar. 31, 2022	$ 385	578,284	(2,468)	(245,943)	$ 330,258
Beginning balance (in shares) at Mar. 31, 2022	29,644,438
Increase (decrease) in shareholders' equity (deficit)
Issuance of ADSs upon exercise of share options		195			195
Issuance of ADSs upon exercise of share options (in shares)	21,879
Share-based compensation expense		5,673			5,673
Foreign currency translation adjustment			2,094		2,094
Net loss				(26,828)	(26,828)
Ending balance at Jun. 30, 2022	$ 385	$ 584,152	$ (374)	$ (272,771)	$ 311,392
Ending balance (in shares) at Jun. 30, 2022	29,666,317				29,666,317