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Note 18 - Stockholders' Equity (Details Textual)	Dec. 31, 2023 shares
Number Of Shares Of Common Stock Subject To Registration Rights Agreement (in shares)	17,085,100
Additional Shares Available for Trading if Exercise Registration Rights (in shares)	6,637,600

X

- Definition

The number of additional shares available for trading on the public market if registration rights are exercised.

+ References

No definition available.

+ Details

Name:	ff_AdditionalSharesAvailableForTradingIfExerciseRegistrationRights
Namespace Prefix:	ff_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Number of shares of common stock subject to registration rights agreement.

+ References

No definition available.

+ Details

Name:	ff_NumberOfSharesOfCommonStockSubjectToRegistrationRightsAgreement
Namespace Prefix:	ff_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant