The amount accrued related to the payments, to be made under License agreement.

No definition available.

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- Definition

Maximum period after written notice received from entity in which counterparty may cure default or breach of contract in order to prevent termination of agreement under the terms of the agreement, , in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
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- Definition

Period after written notice received from counterparty in which entity may cure default or breach of contract obligations in order to prevent termination of agreement under the terms of the agreement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
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- Definition

Amount of initial base payment under the terms of agreement.

+ References

No definition available.

+ Details

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Namespace Prefix:	ctrv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of initial base payment previously paid under the terms of the agreement.

+ References

No definition available.

+ Details

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Namespace Prefix:	ctrv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum period in which payment is considered to be late under the terms of the agreement.

+ References

No definition available.

+ Details

Name:	ctrv_AgreementLatePaymentPeriod
Namespace Prefix:	ctrv_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of occasions in twelve month period in which agreement may be terminated if entity is late on making payment under the terms of the agreement.

+ References

No definition available.

+ Details

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Namespace Prefix:	ctrv_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of cash outflow for milestone payments.

+ References

No definition available.

+ Details

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Namespace Prefix:	ctrv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Aggregate amount of milestone payments that may be payable under the terms of the agreement.

+ References

No definition available.

+ Details

Name:	ctrv_AgreementMilestonePaymentAggregateAmount
Namespace Prefix:	ctrv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of milestone payment that may be payable upon approval of first New Drug Application (NDA) for a licensed product under the terms of the agreement.

+ References

No definition available.

+ Details

Name:	ctrv_AgreementMilestonePaymentApprovalOfFirstNewDrugApplication
Namespace Prefix:	ctrv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of milestone payment that may be payable upon receiving marketing approval under terms of the agreement.

+ References

No definition available.

+ Details

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Namespace Prefix:	ctrv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of milestone payment that may be payable upon achieving net sales threshold under the terms of the agreement.

+ References

No definition available.

+ Details

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Namespace Prefix:	ctrv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Net sales threshold for achieving milestone under the terms of the agreement.

+ References

No definition available.

+ Details

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Namespace Prefix:	ctrv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of milestone payment that may be payable upon initiation of a Phase 3 clinical trial for a licensed product under the terms of the agreement.

+ References

No definition available.

+ Details

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Namespace Prefix:	ctrv_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Minimum threshold percentage of royalty from patents that are irrevocably adjudicated to be invalid under the terms of agreement.

+ References

No definition available.

+ Details

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Namespace Prefix:	ctrv_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Period for which counterparty must provide prior written notice in order to terminate agreement if entity breaches or defaults on obligations, subject to cure period, under the terms of the agreement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Namespace Prefix:	ctrv_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Period for which entity must provide prior written notice in order to terminate agreement if patent(s) that are irrevocably adjudicated to be invalid exceed royalty threshold under the terms of the agreement, , in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Namespace Prefix:	ctrv_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Period for which entity must provide prior written notice for breach related to confidential information and publication in order to terminate agreement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	ctrv_AgreementWrittenNoticePeriodTwoEntity
Namespace Prefix:	ctrv_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the percentage of outstanding shares of common stock upon issuance.

+ References

No definition available.

+ Details

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Namespace Prefix:	ctrv_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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

- Definition

Number of shares of stock issued during the period as part of a transaction to acquire assets that do not qualify as a business combination.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Data Type:	na
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Period Type:

- Details

Name:	us-gaap_CounterpartyNameAxis=ctrv_UniversityCollegeCardiffConsultantsLimitedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Commitments and Contingencies - License Agreement with Cardiff (Details)			9 Months Ended
	Aug. 05, 2013 shares	Mar. 27, 2007 USD ($) item	Mar. 31, 2017 USD ($)
Contribution Agreement
Agreement
Shares issued for assets (in shares) \| shares	9,000,000
Percentage of outstanding shares of common stock upon issuance	100.00%
License Agreement \| Cardiff
Agreement
Written notice period		90 days
Default or breach cure period		90 days
Late payment period		1 month
Number of occasions in 12 month period \| item		2
First written notice period		120 days
Royalty threshold rate (as a percent)		30.00%
Second written notice period		90 days
Counterparty's default or cure period		90 days
Initial base payment made		$ 270,000
Aggregate milestone payment		400,000
Milestone payment upon initiation of phase 3 clinical trial		150,000
Milestone payment upon approval of drug application		250,000
License Agreement \| BMS
Agreement
Aggregate milestone payment		9,000,000
Initial base payment		1,000,000
Milestone payment upon receiving marketing approval		3,000,000
Milestone payment upon achieving net sales threshold		6,000,000
Net sales threshold amount		$ 125,000,000
Milestone payments			$ 0
Amounts accrued related to the payments			$ 0