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Share-based compensation and stockholders' equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | May 17, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Nonvested options forfeited (in shares) |  |  | 200,000 |
At-The-Market Offering |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Sale of stock, aggregate offering amount, maximum |  |  |  | $ 150.0
Sale of stock, number of shares issued in transaction (in shares) | 0 | 1,100,000 |  |
Sale of stock, consideration received on transaction, gross |  | $ 9.1 |  |
Sale of stock, price per share (in dollars per share) |  | $ 8.22 |  |
Sale of stock, amount remaining available for sale of shares | $ 140.9 |  | $ 140.9 |
Stock Options |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock options granted (in shares) |  |  | 4,000,000 |
Stock Options | Tranche One |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award vesting rights, percentage |  |  | 33.33% |
Stock Options | Tranche Two |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award vesting rights, percentage |  |  | 33.33% |
Stock Options | Tranche Three |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award vesting rights, percentage |  |  | 33.33% |
Performance Stock Option |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock options granted (in shares) |  |  | 800,000 |
Award vesting period |  |  | 5 years |
Restricted Stock Units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Equity instruments other than options granted (in shares) |  |  | 200,000 |
Equity instruments other than options, forfeited in period (in shares) |  |  | 100,000 |
Restricted Stock Units | Tranche One |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award vesting rights, percentage |  |  | 33.33% |
Restricted Stock Units | Tranche Two |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award vesting rights, percentage |  |  | 33.33% |
Restricted Stock Units | Tranche Three |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award vesting rights, percentage |  |  | 33.33% |
Long-Term Incentive Award |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Granted long-term incentive award |  |  | $ 8.0 |
Award vesting period |  |  | 5 years |
Performance Shares |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award vesting period |  |  | 3 years |
Performance Shares | Tranche One |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award vesting rights, percentage |  |  | 33.33% |
Performance Shares | Tranche Two |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award vesting rights, percentage |  |  | 33.33% |
Performance Shares | Tranche Three |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award vesting rights, percentage |  |  | 33.33% |

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