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Income taxes - Reconciliation of benefit for income taxes (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income taxes
(Benefit from) provision for income taxes at statutory rate	25.00%	23.50%	19.00%
Increases (decreases) resulting from:
Tax credits	3.70%	0.60%	0.40%
Change in valuation allowance	(11.20%)	(14.80%)	(16.80%)
Net losses surrendered for research credit	(14.20%)	(11.10%)	(6.50%)
Impact of statutory rate change		2.70%	11.30%
Impact of foreign exchange rates	(1.00%)	(0.10%)	(9.90%)
Other	0.40%	(1.60%)	3.80%
Effective income tax rate	2.70%	(0.80%)	1.30%

X

- Definition

Percentage of reported income tax expense from difference to expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations, attributable to foreign exchange rates.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic feieral statutory income tax rates to pretax income (loss) from continuing operations attributable to Impact of statutory rate change.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to net losses surrendered for research credit.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the valuation allowance for deferred tax assets.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits.

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