Revenue and Deferred Revenue - Narrative (Details) $ in Millions	3 Months Ended
Mar. 31, 2021 USD ($)
Revenue from Contract with Customer [Abstract]
Revenue recognized related to performance obligations satisfied or partially satisfied in prior periods	$ 0.6

Revenue, Performance Obligation, Satisfied Or Partially Satisfied In Prior Periods, Amount

No definition available.

Name:	crct_RevenuePerformanceObligationSatisfiedOrPartiallySatisfiedInPriorPeriodsAmount
Namespace Prefix:	crct_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration