Share based compensation - Fair Value of Equity Settled Options (Details) - $ / shares |
12 Months Ended | |||
---|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Sep. 01, 2022 |
Aug. 11, 2021 |
|
Share options | ||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
Expected future volatility | 76.00% | 57.00% | ||
Expected dividend rate | 0.00% | 0.00% | ||
Risk-free rate, minimum | 3.40% | 0.50% | ||
Risk-free rate, maximum | 3.50% | 0.80% | ||
Expected life after vesting | 3 years 6 months | 2 years | ||
Share price at valuation date (in USD per share) | $ 1.40 | |||
Performance stock units | ||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
Expected future volatility | 81.00% | |||
Expected dividend rate | 0.00% | |||
Risk-free rate | 3.54% | |||
Share price at valuation date (in USD per share) | $ 3.96 |