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Stock-based compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2021 | Dec. 31, 2025 | Dec. 31, 2024
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Service-based stock options that generally have a contractual life |  | 8 years | 8 years 4 months 24 days
Unrecognized compensation cost |  | $ 5.1 |
Weighted-average amortization period |  | 1 year 6 months |
Expected dividend yield |  | 0.00% | 0.00%
Common stock issued |  | 10,000 | 5,000
Stock Options |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Expected dividend yield |  | 0.00% |
Stock Options | Maximum |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Service-based stock options that generally have a contractual life |  | 10 years |
Vesting period |  | 4 years |
Restricted Share |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Weighted average fair value |  | $ 6.02 | $ 8.02
2021 Equity Incentive Plan |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Percentage of increase in number of shares reserved for issuance | 4.00% |  |
Common stock were authorized to be issued |  | 3,239,368 |
Shares were available for future issuance | 668,297 | 145,221 |

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