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

Represents the state tax credit related to California Enterprise Zone hiring credits.

No definition available.

Name:	cuo_CaliforniaEnterpriseZoneHiringCredits
Namespace Prefix:	cuo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the tax effected amount of the remaining unused pre-tax charitable contributions.

No definition available.

Name:	cuo_PreTaxContributionsTaxEffect
Namespace Prefix:	cuo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Portion of the deferred tax asset arising from a tax credit carryforward of California enterprise zone, deductions for which it is more likely than not that a tax benefit will not be realized.

No definition available.

Name:	cuo_TaxCreditCarryforwardValuationAllowanceRelatedToCaliforniaEnterpriseZone
Namespace Prefix:	cuo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Portion of the deferred tax asset arising from a tax credit carryforward of charitable contributions, deductions for which it is more likely than not that a tax benefit will not be realized.

No definition available.

Name:	cuo_TaxCreditCarryforwardValuationAllowanceRelatedToCharitableContributions
Namespace Prefix:	cuo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the tax effected amount of the remaining unused pre-tax California enterprise zone.

No definition available.

Name:	cuo_TaxEffectCaliforniaEnterpriseZonePreTax
Namespace Prefix:	cuo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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

The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32559-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 30
-Paragraph 5
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=75018887&loc=d3e30536-109315

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319