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Inventories (Additional Information) (Details) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2026 | Jun. 30, 2025
Inventory Disclosure [Abstract] |  |
Write-offs of obsolete inventory | $ (179) | $ 0

X
- Definition Write-offs of obsolete inventory + References No definition available. + Details
Name: | ftci_WriteOffOfObsoleteInventory
Namespace Prefix: | ftci_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InventoryDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration