Name:	cotv_LossContingencyCentersForMedicareAndMedicaidServicesEligibleClaimsPendingInAppealProviderSettlementOfferPercentage
Namespace Prefix:	cotv_
Data Type:	num:percentItemType
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Represents the Technical Direction Letter issued by the Centers for Medicare and Medicaid Services (CMS) to the Medicare Recovery Audit Contractors (RACs) on July 1, 2015 indicating the percentage of the original claim amounts to which the RACs will be entitled as a contract contingency fee on settled amounts of claims.

No definition available.

Name:	cotv_TechnicalDirectionLetter1July2015MedicareRecoveryAuditContractorContractContingencyFeePercentageOnSettledAppealClaims
Namespace Prefix:	cotv_
Data Type:	num:percentItemType
Balance Type:	na
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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_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amount of loss contingency liability.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

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

The difference between the maximum amount of estimated loss and the amount recorded as of the balance sheet date.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 05
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6395354&loc=d3e12631-108344