Fair Value - Additional Information (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Fair value assets transfers between Level 2 and Level 3	$ 0	$ 0

Fair value assets among level 2 and level 3 transfers amount.

No definition available.

Name:	cue_FairValueAssetsAmongLevel2AndLevel3TransfersAmount
Namespace Prefix:	cue_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant