Product revenue and reserves - Rebate Liability (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2024 USD ($)
Contract with Customer, Refund Liability [Roll Forward]
Balance at December 31, 2023	$ 5,365
Provision for rebates	8,506
Payments/credits	0
Balance at September 30, 2024	$ 13,871