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v3.26.1

Prepaid and other current assets (Additional Information) (Details) - USD ($) $ in Millions | Jun. 30, 2026 | Dec. 31, 2025
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Prepaid Expense and Other Assets, Current [Abstract] |  |
Short term non-interest-bearing customer advance | $ 2.0 | $ 2.0

X
- Definition Short term non-Interest-Bearing customer advance. + References No definition available. + Details
Name: | ftci_ShortTermNonInterestBearingCustomerAdvance
Namespace Prefix: | ftci_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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