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Retirement Plan - Additional Information (Detail) - USD ($) | 12 Months Ended
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Nov. 30, 2020 | Nov. 30, 2019
Compensation And Retirement Disclosure [Abstract] |  |
Amount allows under 401(k) retirement plan | 15.00% |
Contribution to 401(k) retirement plan | $ 179,000 | $ 205,000

X
- Definition Defined contribution plan employer matching contribution amount. + References No definition available. + Details
Name: | ccel_DefinedContributionPlanEmployerMatchingContributionAmount
Namespace Prefix: | ccel_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
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