INCOME TAXES (Details 2) (States, Colorado)	3 Months Ended
Mar. 29, 2014
States \| Colorado
Tax credits
Tax credits carry-forward period	7 years

The tax credits carry forwards expiration period in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	cuo_TaxCreditCarryforwardsExpirationPeriod
Namespace Prefix:	cuo_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration