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Retirement Plan - Additional Information (Detail) - USD ($)	12 Months Ended
	Nov. 30, 2019	Nov. 30, 2018
Defined Benefit Plan [Abstract]
Amount allows under 401(k) retirement plan	15.00%
Contribution to 401(k) retirement plan	$ 205,000	$ 158,000

X

- Definition

Defined contribution plan employer matching contribution amount.

+ References

No definition available.

+ Details

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Namespace Prefix:	ccel_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_DefinedBenefitPensionPlansAndDefinedBenefitPostretirementPlansDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration