INCOME TAXES (Details 2) (States, Colorado)	3 Months Ended
Mar. 30, 2013
States \| Colorado
Tax credits
Tax credits carry-forward period	7 years

The period (in years) over which the tax credit carryforwards shall expire.

No definition available.

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