XML 55 R43.htm IDEA: XBRL DOCUMENT
v3.21.2

Stockholders' Equity - Warrants (Details) - $ / shares | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2021 | Jun. 30, 2021
Number of Warrants |  |
Balance of warrants outstanding at the end of the period (in shares) |  | 4,490,159
Exercised (in shares) |  | (770,833)
Balance of warrants outstanding at the beginning of the period (in shares) | 5,260,992 | 5,260,992
Weighted Average Exercise Price Per Share |  |
Weighted average exercise price of warrants at the beginning of the period (in USD per share) | $ 5.19 | $ 5.19
Exercised (in USD per share) |  | 1.64
Weighted average exercise price of warrants at the end of the period (in USD per share) |  | $ 5.80
Term |  |
Weighted-Average Remaining Contractual Term | 4 years 1 month 6 days | 3 years 6 months

X
- Definition Represents the number of warrants or rights exercised during the period. + References No definition available. + Details
Name: | crdf_ClassOfWarrantOrRightNumberExercised
Namespace Prefix: | crdf_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The period over which each class of warrants or rights outstanding may be exercised. + References No definition available. + Details
Name: | crdf_ClassOfWarrantOrRightTermOfOutstandingWarrantsOrRights
Namespace Prefix: | crdf_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | crdf_ClassOfWarrantOrRightTermOfWarrantsOrRightsAbstract
Namespace Prefix: | crdf_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the weighted average exercise price of each class of warrants or rights outstanding. + References No definition available. + Details
Name: | crdf_ClassOfWarrantOrRightWeightedAverageExercisePriceOfWarrantsOrRights
Namespace Prefix: | crdf_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition No definition available + References No definition available. + Details
Name: | crdf_ClassOfWarrantOrRightWeightedAverageExercisePriceOfWarrantsOrRightsAbstract
Namespace Prefix: | crdf_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the weighted average exercise price of each class of warrants or rights exercised during the period. + References No definition available. + Details
Name: | crdf_ClassOfWarrantOrRightWeightedAverageExercisePriceOfWarrantsOrRightsExercised
Namespace Prefix: | crdf_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | crdf_WarrantsAndRightsRollForward
Namespace Prefix: | crdf_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of warrants or rights outstanding. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant