Ordinary shares - Share Purchase Agreement (Details) - shares	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Class of Stock [Line Items]
Ordinary shares, shares issued	42,384,799			29,873,893
Ordinary shares, shares outstanding	42,384,799			29,873,893
Ordinary Shares
Class of Stock [Line Items]
Ordinary shares, shares outstanding	42,384,799	30,585,940	30,031,758	29,873,893	29,678,431	29,666,317	29,644,438	29,579,364
Non voting ordinary shares | Ordinary Shares
Class of Stock [Line Items]
Ordinary shares, shares issued	4,705,882
Ordinary shares, shares outstanding	4,705,882
Voting ordinary shares | Ordinary Shares
Class of Stock [Line Items]
Ordinary shares, shares issued	37,678,917
Ordinary shares, shares outstanding	37,678,917