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Leases - Additional Information (Details)	12 Months Ended
	Dec. 31, 2025 USD ($)
Leases [Abstract]
Lease expires date	Feb. 28, 2027
Monthly rent payments	$ 67,000
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-types: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

- Definition

Date which lease or group of leases is set to expire, in YYYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_LeaseExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
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