XML 51 R42.htm IDEA: XBRL DOCUMENT
v3.23.3

Note 4 - Restructuring Activities (Details Textual) $ in Thousands | Sep. 30, 2023 USD ($)
--- | ---
CHINA | Backlog [Member] |
Restructuring and Related Cost, Expected Cost Remaining | $ 3

X
- Definition Amount of expected cost remaining for the specified restructuring cost. + References No definition available. + Details
Name: | us-gaap_RestructuringAndRelatedCostExpectedCostRemaining1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Details
Name: | us-gaap_RestructuringCostAndReserveAxis=ftek_BacklogMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |