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v3.21.2

Revenue and Deferred Revenue - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2021
Revenue from Contract with Customer [Abstract] |  |
Revenue recognized related to performance obligations satisfied or partially satisfied in prior periods | $ 0.1 | $ 0.8

X
- Definition Revenue, Performance Obligation, Satisfied Or Partially Satisfied In Prior Periods, Amount + References No definition available. + Details
Name: | crct_RevenuePerformanceObligationSatisfiedOrPartiallySatisfiedInPriorPeriodsAmount
Namespace Prefix: | crct_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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