Revenue - Schedule of Accruals for Rebates, Chargebacks and Returns (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2025 USD ($)
Accruals for Rebates and Chargebacks [Roll Forward]
As of December 31, 2024	$ 110,924
Provisions related to sales in the period	105,257
Adjustments related to sales in prior periods	(5,983)
Credits and payments made	(60,730)
As of June 30, 2025	149,468
Rebates
Accruals for Rebates and Chargebacks [Roll Forward]
As of December 31, 2024	108,521
Provisions related to sales in the period	78,009
Adjustments related to sales in prior periods	(5,983)
Credits and payments made	(34,372)
As of June 30, 2025	146,175
Chargebacks
Accruals for Rebates and Chargebacks [Roll Forward]
As of December 31, 2024	2,038
Provisions related to sales in the period	20,001
Adjustments related to sales in prior periods	0
Credits and payments made	(19,578)
As of June 30, 2025	2,461
Returns
Accruals for Rebates and Chargebacks [Roll Forward]
As of December 31, 2024	365
Provisions related to sales in the period	7,247
Adjustments related to sales in prior periods	0
Credits and payments made	(6,780)
As of June 30, 2025	$ 832

Immunocore Holdings plc 10-Q