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Note 2 - Significant Accounting Policies and Basis of Presentation (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Property Plant And Equipment Estimated Useful Lives [Table Text Block]

Building & building equipment (years)			20 – 39
Machinery and equipment (years)			3 – 33
Transportation equipment (years)			5 – 33
Other (years)			5 – 33

X

- Definition

Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment).

+ References

No definition available.

+ Details

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Namespace Prefix:	ff_
Data Type:	dtr-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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