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Financial assets - Schedule of Prepaid Forward Contract (Details) $ in Thousands			3 Months Ended
	Jun. 13, 2025 USD ($) shares	Dec. 06, 2024 shares	Sep. 30, 2025 USD ($)
2030 Convertible Notes | Convertible debt
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Aggregate number of ordinary shares underlying the contract | shares		5,700,000
2029 Convertible Notes | Convertible debt
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Aggregate number of ordinary shares underlying the contract | shares	8,818,000
2030 Prepaid Forward Contract
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Net proceeds used to purchase the contract (in thousands) | $			$ 73,717
2029 Prepaid Forward Contract
Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Line Items]
Net proceeds used to purchase the contract (in thousands) | $	$ 92,500

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