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v3.25.1

Note 1 - General (Details Textual) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Employee Retention Credit Receivable | $ 1,677 | $ 1,677

X
- Definition Represents the receivable for the Employee Retention Credit ("ERC"). + References No definition available. + Details
Name: | ftek_EmployeeRetentionCreditReceivable
Namespace Prefix: | ftek_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant