Note 7 - Warrants - Warrant Activity (Details)	12 Months Ended
Dec. 31, 2025 shares
Outstanding (in shares)	2,850,000
Granted (in shares)	0
Exercised (in shares)	0
Outstanding (in shares)	2,850,000

The number of warrants or rights exercised during period.

No definition available.

Name:	ftek_ClassOfWarrantOrRightExercisedDuringPeriod
Namespace Prefix:	ftek_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration