Condensed Consolidated Statements of Operations and Comprehensive Loss (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Change in fair value of advanced subscription agreements, related party	$ (3,665)	$ (769)

Gain (Loss) From Change In Fair Value Of Advanced Subscription Agreements, Related Party

No definition available.

Name:	wejo_GainLossFromChangeInFairValueOfAdvancedSubscriptionAgreementsRelatedParty
Namespace Prefix:	wejo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration