Subsequent events (Details) £ in Millions	Apr. 11, 2023 GBP (£)
Termination and Transfer Agreement \| Subsequent events. \| GlaxoSmithKline Intellectual Property Development Ltd (GSK)
Upfront and milestone payment receivable	£ 30

Amount of upfront and milestone payment receivable under the agreement.

No definition available.

Name:	adap_UpfrontAndMilestonePaymentReceivable
Namespace Prefix:	adap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant