Class of Warrant or Right, Percentage of Common Stock Outstanding

No definition available.

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- Definition

Debt Exchange, Rate

+ References

No definition available.

+ Details

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- Definition

The number of warrants or rights which entitle the entity to receive future services in exchange for the unvested, forfeitable warrants or rights.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 50
-Section S99
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6784392&loc=d3e188667-122775

+ Details

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- Definition

Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

+ References

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 20
-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 16
-Article 9

+ Details

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

- Definition

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.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Gross amount of debt extinguished.

+ References

No definition available.

+ Details

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

- Definition

The cash outflow from the repayment of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585

+ Details

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

- Details

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- Details

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- Details

Name:	cvo_DebtTransactionsAxis=cvo_Allianz7NotesPurchaseAgreementMember
Namespace Prefix:
Data Type:	na
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- Details

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Namespace Prefix:
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Long-Term Debt (7% Note Purchase Agreement) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Apr. 02, 2016	Dec. 31, 2016	Jan. 02, 2016	May 10, 2016
Debt Instrument [Line Items]
Repayment of 7% senior exchangeable notes		$ 45,903	$ 0
Convertible debt [Member] \| 7% senior exchangeable notes due 2017 [Member]
Debt Instrument [Line Items]
Long-term debt, outstanding principal amount		5,500	$ 83,300
Debt extinguishment amount	$ 34,500	5,700
Allianz 7% notes purchase agreement [Member] \| Convertible debt [Member] \| 7% senior exchangeable notes due 2017 [Member]
Debt Instrument [Line Items]
Debt extinguishment amount		37,500
Allianz 7% notes purchase agreement [Member] \| Allianz [Member] \| Convertible debt [Member] \| 7% senior exchangeable notes due 2017 [Member]
Debt Instrument [Line Items]
Long-term debt, outstanding principal amount				$ 37,500
Debt exchange rate (percent)				0.6
Warrants, percentage of common stock outstanding (percent)				3.30%
Debt extinguishment amount		37,500
Repayment of 7% senior exchangeable notes		$ 22,500
Warrants, amount issued (shares)		2,239,827