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v3.26.1

Commitments and Contingencies - Additional Information (Detail) $ in Millions | Jun. 30, 2026 USD ($)
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Contingencies And Commitments [Line Items] |
Purchase order obligations for the maintenance and general expenses of convenience properties | $ 2.2

X
- Definition Commitments for maintenance gen exp of properties. + References No definition available. + Details
Name: | curb_CommitmentsForMaintenanceGenExpOfProperties
Namespace Prefix: | curb_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Contingencies and commitments. + References No definition available. + Details
Name: | curb_ContingenciesAndCommitmentsLineItems
Namespace Prefix: | curb_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration