v3.26.1
REVENUE RECOGNITION (Details) - USD ($)
Dec. 31, 2025
Dec. 31, 2024
REVENUE RECOGNITION
Fair value of trust assets
$ 122,111,000
$ 120,857,000
X
- References
No definition available.
+ Details
Name:
fkys_TrustAssetsFairValueDisclosure
Namespace Prefix:
fkys_
Data Type:
xbrli:monetaryItemType
Balance Type:
debit
Period Type:
instant
X
- References
No definition available.
+ Details
Name:
us-gaap_RevenueFromContractWithCustomerAbstract
Namespace Prefix:
us-gaap_
Data Type:
xbrli:stringItemType
Balance Type:
na
Period Type:
duration