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Commitments and contingencies - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Jun. 30, 2025	Apr. 30, 2025
Loss Contingencies [Line Items]
Capital expenditure commitments	$ 1,083,825	$ 368,805
Loss contingencies	0	$ 20,000
GST under dispute
Loss Contingencies [Line Items]
Estimate of possible loss	23,400
Loss contingencies	$ 0
NOA hardware imported
Loss Contingencies [Line Items]
Estimate of possible loss			$ 100,000

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