Note 19 - Stockholders' Equity (Details Textual)	Dec. 31, 2019 shares
Additional Shares Available for Trading if Exercise Registration Rights	7,012,600

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

No definition available.

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