Equity-based compensation - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2026	Dec. 31, 2025
Share-Based Payment Arrangement [Abstract]
Number of stock options outstanding, beginning balance	5,899,875
Number of stock options, granted	1,764,987
Number of stock options, exercised	(6,023)
Number of stock options, Cancelled	(6,955)
Number of stock options outstanding, ending balance	7,651,884	5,899,875
Number of options vested and exercisable	3,574,189
Number of options unvested and expected to vest	4,077,695
Weighted average exercise price, Outstanding at the beginning of the period	$ 5.87
Weighted average exercise price, Granted	18.05
Weighted average exercise price, Exercised	4.95
Weighted average exercise price, Cancelled	15.88
Weighted average exercise price, Outstanding at the end of the period	8.67	$ 5.87
Weighted average exercise price, exercisable	4.12
Weighted average exercise price, unvested and expected to vest	$ 12.66
Weighted average remaining contractual life	7 years 9 months 14 days	7 years 6 months 21 days
Weighted average remaining contractual life, exercisable	6 years 3 months 3 days
Weighted average remaining contractual life, vested and expected to vest	9 years 1 month 17 days
Aggregate intrinsic value outstanding, beginning balance	$ 32,946
Aggregate intrinsic value, Exercised	85
Aggregate intrinsic value outstanding, ending balance	70,842	$ 32,946
Aggregate intrinsic value, vested and exercisable	49,228
Aggregate intrinsic value, unvested and expected to vest	$ 21,614

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of share options (or share units) exercised during the current period.

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