Basis of presentation - Debt and Leased assets (Details) $ in Thousands	12 Months Ended
Dec. 31, 2020 USD ($)
Basis of presentation
Gain or loss is recognized at maturity or early conversion of the debt	$ 0
Remaining lease term	30 years

Gain or loss recognized at maturity or early conversion of the debt

No definition available.

Name:	curlf_GainOrLossRecognizedAtMaturityOrEarlyConversionOfDebt
Namespace Prefix:	curlf_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration