Basic and diluted net loss per share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Basic and diluted net loss per share [Abstract]
Net loss for the year	$ (55,287)	$ (52,543)	$ (180,029)
Basic weighted average number of ordinary shares (in shares)	48,888,975	45,714,923	42,488,579
Diluted weighted average number of ordinary shares (in shares)	48,888,975	45,714,923	42,488,579
Basic net loss per share (in dollars per share)	$ (1.13)	$ (1.15)	$ (4.24)
Diluted net loss per share (in dollars per share)	$ (1.13)	$ (1.15)	$ (4.24)
Stock Options [Member]
Basic and Diluted Net Loss per Share [Abstract]
Antidilutive securities excluded from earnings per share (in shares)	8,967,882	9,893,244	9,198,460