Commitments and Contingencies (Details) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024
Commitments and Contingencies Disclosure [Abstract]
Milestone and royalty payments made	$ 0	$ 0

Collaborative Arrangement, Rights and Obligations, Milestone And Royalty Payments Made

No definition available.

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