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Shareholders' equity (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 2 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Mar. 01, 2021 | Apr. 30, 2021 | Sep. 30, 2021 | Sep. 30, 2021
Aggregate offering price |  |  |  | $ 29,565
Tax benefit past share issuance cost |  |  | $ 0 | 2,977
Sales Agreement with SVB Leerink LLC |  |  |  |
Percentage of gross proceeds | 3.00% |  |  |
Net proceeds |  | $ 29,600 |  |
Sales Agreement with SVB Leerink LLC | Direct Incremental Labor |  |  |  |
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs |  |  | $ 0 | $ 1,300
Sales Agreement with SVB Leerink LLC | Ordinary shares |  |  |  |
Shares issued in connection with offering |  | 921,730 |  |
Share price (in dollars per share) |  | $ 33.52 |  |
Sales Agreement with SVB Leerink LLC | Maximum |  |  |  |
Aggregate offering price | $ 200,000 |  |  |

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