Consolidated Statements of Shareholders’ Equity - USD ($) $ in Thousands | Total | At-The-Market Sales Agreement | Ordinary shares | Ordinary shares At-The-Market Sales Agreement | Additional paid-in capital | Additional paid-in capital At-The-Market Sales Agreement | Ordinary shares held in treasury | Accumulated other comprehensive loss | Accumulated deficit |
Beginning balance (in shares) at Dec. 31, 2021 | | | 489,177,550 | | | | | | |
Beginning balance at Dec. 31, 2021 | $ 148,005 | | $ 31,855 | | $ 385,070 | | $ (603) | $ (4,601) | $ (263,716) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | |
Net loss | (24,837) | | | | | | | | (24,837) |
Issuance of common shares (in shares) | | | | 80,696 | | | | | |
Issuance of common shares | | $ 67 | | $ 5 | | $ 62 | | | |
Restricted share units vested | | | | | | | 186 | | (186) |
Issuance of ordinary shares to treasury (in shares) | | | 4,800,000 | | | | | | |
Issuance of ordinary shares to treasury | 0 | | $ 322 | | | | (322) | | |
Common shares withheld for taxes on vested stock awards | (793) | | | | (793) | | | | |
Equity settled share-based compensation reclassified as cash-settled | 118 | | | | 118 | | | | |
Share-based compensation | 3,747 | | | | 3,747 | | | | |
Ending balance (in shares) at Mar. 31, 2022 | | | 494,058,246 | | | | | | |
Ending balance at Mar. 31, 2022 | 126,307 | | $ 32,182 | | 388,204 | | (739) | (4,601) | (288,739) |
Beginning balance (in shares) at Dec. 31, 2021 | | | 489,177,550 | | | | | | |
Beginning balance at Dec. 31, 2021 | 148,005 | | $ 31,855 | | 385,070 | | (603) | (4,601) | (263,716) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | |
Net loss | (42,603) | | | | | | | | |
Ending balance (in shares) at Jun. 30, 2022 | | | 494,058,246 | | | | | | |
Ending balance at Jun. 30, 2022 | 110,880 | | $ 32,182 | | 390,543 | | (591) | (4,601) | (306,653) |
Beginning balance (in shares) at Mar. 31, 2022 | | | 494,058,246 | | | | | | |
Beginning balance at Mar. 31, 2022 | 126,307 | | $ 32,182 | | 388,204 | | (739) | (4,601) | (288,739) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | |
Net loss | (17,766) | | | | | | | | (17,766) |
Restricted share units vested | | | | | | | 148 | | (148) |
Common shares withheld for taxes on vested stock awards | (689) | | | | (689) | | | | |
Equity settled share-based compensation reclassified as cash-settled | (25) | | | | (25) | | | | |
Share-based compensation | 3,053 | | | | 3,053 | | | | |
Ending balance (in shares) at Jun. 30, 2022 | | | 494,058,246 | | | | | | |
Ending balance at Jun. 30, 2022 | $ 110,880 | | $ 32,182 | | 390,543 | | (591) | (4,601) | (306,653) |
Beginning balance (in shares) at Dec. 31, 2022 | 606,301,054 | | 631,338,246 | | | | | | |
Beginning balance at Dec. 31, 2022 | $ 230,466 | | $ 40,526 | | 529,187 | | (1,549) | (4,601) | (333,097) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | |
Net loss | (16,743) | | | | | | | | (16,743) |
Issuance of common shares (in shares) | | | 20,321,384 | | | | | | |
Issuance of common shares | 56,909 | | $ 1,227 | | 55,682 | | | | |
Restricted share units vested | | | | | | | 270 | | (270) |
Share options exercised | 1,827 | | | | 1,756 | | 71 | | |
Share-based compensation | 4,290 | | | | 4,290 | | | | |
Ending balance (in shares) at Mar. 31, 2023 | | | 651,659,630 | | | | | | |
Ending balance at Mar. 31, 2023 | $ 276,749 | | $ 41,753 | | 590,915 | | (1,208) | (4,601) | (350,110) |
Beginning balance (in shares) at Dec. 31, 2022 | 606,301,054 | | 631,338,246 | | | | | | |
Beginning balance at Dec. 31, 2022 | $ 230,466 | | $ 40,526 | | 529,187 | | (1,549) | (4,601) | (333,097) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | |
Net loss | $ (25,550) | | | | | | | | |
Ending balance (in shares) at Jun. 30, 2023 | 635,787,302 | | 651,659,630 | | | | | | |
Ending balance at Jun. 30, 2023 | $ 273,093 | | $ 41,753 | | 596,059 | | (975) | (4,601) | (359,143) |
Beginning balance (in shares) at Mar. 31, 2023 | | | 651,659,630 | | | | | | |
Beginning balance at Mar. 31, 2023 | 276,749 | | $ 41,753 | | 590,915 | | (1,208) | (4,601) | (350,110) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | | | | | |
Net loss | (8,807) | | | | | | | | (8,807) |
Restricted share units vested | | | | | | | 226 | | (226) |
Share options exercised | 77 | | | | 70 | | 7 | | |
Share-based compensation | $ 5,074 | | | | 5,074 | | | | |
Ending balance (in shares) at Jun. 30, 2023 | 635,787,302 | | 651,659,630 | | | | | | |
Ending balance at Jun. 30, 2023 | $ 273,093 | | $ 41,753 | | $ 596,059 | | $ (975) | $ (4,601) | $ (359,143) |