Product revenue and reserves - Rebate Liability (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)
Contract with Customer, Refund Liability [Roll Forward]
Balance at December 31, 2022	$ 0
Provision for rebates	5,365
Payments/credits	0
Balance at December 31, 2023	$ 5,365