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Leases - Narrative (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($)
Leases [Abstract]
Monthly rent payments	$ 61
Annual rent increase, percentage	3.00%

X

- Definition

Lessee, Operating Lease, Annual Rent Increase, Percentage

+ References

No definition available.

+ Details

Name:	crdf_LesseeOperatingLeaseAnnualRentIncreasePercentage
Namespace Prefix:	crdf_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Lessee, Operating Lease, Monthly Rent Payment

+ References

No definition available.

+ Details

Name:	crdf_LesseeOperatingLeaseMonthlyRentPayment
Namespace Prefix:	crdf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_LeasesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration