Represents maximum selling agent fee expressed as a percentage of gross sales price per share sold.

No definition available.

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

- Definition

Maximum aggregate share amount issuable under the agreement.

+ References

No definition available.

+ Details

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

Name:	ctrv_ScheduleOfStockholdersEquityStockTransactionsLineItems
Namespace Prefix:	ctrv_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Face amount or stated value per share of common stock.

+ 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 210.5-02.29)
-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 30
-Article 5

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash inflow from the additional capital contribution to the entity.

+ 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 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585

+ Details

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

- Definition

Number of new stock issued during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30
-Article 5

+ Details

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

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=ctrv_ControlledEquityOfferingSalesAgreementMarch92015Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Stockholder's Equity and Derivative Liability - Controlled Equity Offering Sales Agreement (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		9 Months Ended
	Mar. 09, 2015	Mar. 31, 2017	Jun. 30, 2016
Controlled Equity Offering Sales Agreement
Common stock, par value (in dollars per share)		$ 0.0001	$ 0.0001
Controlled Equity Offering Sales Agreement
Controlled Equity Offering Sales Agreement
Common stock, par value (in dollars per share)	$ 0.0001
Maximum aggregate offering price	$ 50.0
Selling agent fee as a percentage of gross sales price per share sold	3.00%
Sale of shares (in shares)		6.4
Proceeds from Issuance of Common Stock		$ 13.6