Fair Value Measurements and Marketable Securities - Additional Information (Details) $ in Thousands	Jun. 30, 2022 USD ($)
Fair Value Disclosures [Abstract]
Fair value of financial assets transfers between level 1 and level 2	$ 0

Fair value assets between levels transfers amount.

No definition available.

Name:	ortx_FairValueAssetsBetweenLevelsTransfersAmount
Namespace Prefix:	ortx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant