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v3.21.2

Note 4 - Restructuring Activities (Details Textual) $ in Thousands | Sep. 30, 2021 USD ($)
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CHINA |
Discontinued Operations, Revenue, Remaining Performance Obligation, Amount | $ 10

X
- Definition Represents the amount of remaining performance obligation associated with revenue from discontinued operations. + References No definition available. + Details
Name: | ftek_DiscontinuedOperationsRevenueRemainingPerformanceObligationAmount
Namespace Prefix: | ftek_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | srt_StatementGeographicalAxis=country_CN
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |