Name:	cuo_DebtInstrumentCovenantEBITDARequirements
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Represents the ratio of the sum for such period of adjusted EBITDA, plus the aggregate fixed charge cure amount, if any, minus the sum of income taxes paid in cash and all unfinanced capital expenditures to the sum of interest expense and scheduled principal payments of the term debt under the terms of the credit agreement's covenants.

No definition available.

Name:	cuo_DebtInstrumentCovenantFixedChargeCoverageRatio
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Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

Represents debt instrument covenant fixed charge leverage ratio.

No definition available.

Name:	cuo_DebtInstrumentCovenantFixedChargeLeverageRatio
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Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

Represents the maximum annual capital expenditures that may be incurred as per the terms of the credit agreement's covenants.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Represents the maximum annual capital expenditures that may be incurred in next twelve months following the latest fiscal year, as per the terms of the credit agreement's covenants.

No definition available.

Name:	cuo_DebtInstrumentCovenantMaximumAnnualCapitalExpendituresInNextTwelveMonths
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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

Represents the maximum annual capital expenditures that may be incurred in year two following the latest fiscal year, as per the terms of the credit agreement's covenants.

No definition available.

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

Represents the base amount that is used in the calculation of minimum tangible net worth threshold amount as per the terms of the credit agreement's covenants.

No definition available.

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

Represents the percentage of the consolidated net income that is used in the calculation of minimum tangible net worth threshold amount as per the terms of the credit agreement's covenants.

No definition available.

Name:	cuo_DebtInstrumentCovenantMinimumTangibleNetWorthThresholdPercentageOfConsolidatedNetIncome
Namespace Prefix:	cuo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

The debt instrument covenant period after end of each fiscal year within which specified percentage of excess cash flow to be paid in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

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

Represents the specified percentage of excess cash flow to be paid after the end of each fiscal year, as per the terms of the credit agreement's covenants.

No definition available.

Name:	cuo_DebtInstrumentCovenantSpecifiedPercentageOfExcessCashFlowToBePaidAfterEndOfEachFiscalYear
Namespace Prefix:	cuo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the borrowings under the credit facility as a percentage of capital expenditures used as collateral to secure the financing.

No definition available.

Name:	cuo_LineOfCreditFacilityBorrowingCapacityAsPercentageOfCapitalExpenditures
Namespace Prefix:	cuo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents borrowings under the credit facility as a percentage of eligible accounts receivable used as collateral to secure the financing.

No definition available.

Name:	cuo_LineOfCreditFacilityBorrowingCapacityAsPercentageOfEligibleAccountsReceivable
Namespace Prefix:	cuo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents borrowings under the credit facility as a percentage of eligible inventories used as collateral to secure the financing.

No definition available.

Name:	cuo_LineOfCreditFacilityBorrowingCapacityAsPercentageOfEligibleInventories
Namespace Prefix:	cuo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the information pertaining to maximum debt instruments charges related to computation of consolidated net income.

No definition available.

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

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

No definition available.

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

Face (par) amount of debt instrument at time of issuance.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

No definition available.

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Average amount borrowed under the credit facility during the period.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The maximum amount of borrowing capacity under a line of credit that is available as of the balance sheet date for financing purchases of goods acquired for inventory or imminent delivery to a customer.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Maximum amount borrowed under the credit facility at any time during the period.

No definition available.

Name:	us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

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Data Type:	xbrli:monetaryItemType
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Carrying value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Name:	us-gaap_SecuredDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Carrying amount of collateralized debt obligations with maturities initially due after one year or beyond the operating cycle, if longer, excluding the current portion. Obligations include, but not limited to, mortgage loans, chattel loans, and other borrowings secured by assets.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Name:	cuo_DebtInstrumentCovenantPeriodAxis=cuo_December302012ToDecember282013Member
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Name:	cuo_DebtInstrumentCovenantPeriodAxis=cuo_PeriodEndingApril042015Member
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Name:	cuo_DebtInstrumentCovenantPeriodAxis=cuo_PeriodEndingJanuary032015Member
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Name:	cuo_DebtInstrumentCovenantPeriodAxis=cuo_PeriodEndingSeptember272014Member
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_LongtermDebtTypeAxis=cuo_TermDebtAndRevolvingCreditMember
Namespace Prefix:
Data Type:	na
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Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_RevolvingCreditFacilityMember
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Data Type:	na
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