Product revenue and reserves - Rebate Liability (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)
Contract with Customer, Refund Liability [Roll Forward]
Balance at December 31, 2023	$ 5,365
Provision for rebates	3,780
Payments/credits	0
Balance at March 31, 2024	$ 9,145