v3.20.1

LEGAL PROCEEDINGS (Details) | 3 Months Ended
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Mar. 28, 2020 item
LEGAL PROCEEDINGS |
Number of proceedings having material adverse effect on the consolidated results of operations, cash flows or financial condition | 0

X
- Definition Represents the number of events occurred that would have a material effect on the estimated proved reserves. + References No definition available. + Details
Name: | cuo_LossContingencyNumberOfClaimsArisingInPeriodHavingMaterialEffectOnFinancialCondition
Namespace Prefix: | cuo_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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