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Related Parties (Details Textual) (USD $)
12 Months Ended
Dec. 31, 2014
Related Party Transaction [Line Items]  
Intellectual property license agreement fees description One percent (1%) of net sales
Intellectual property development fees description Two percent (2%) of net sales proceeds
Amounts paid $ 2,288,284us-gaap_RelatedPartyTransactionDueFromToRelatedParty
License Agreement Terms [Member]  
Related Party Transaction [Line Items]  
R&D agreement termination description The R&D Agreement can be terminated by either party at any time upon the receipt of 90 days written notice to the other party.
Accrued balance 150,000us-gaap_AccruedLiabilitiesCurrentAndNoncurrent
/ us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis
= us-gaap_LicenseAgreementTermsMember
Amounts Due In 2016 [Member]  
Related Party Transaction [Line Items]  
Amounts paid 275,546us-gaap_RelatedPartyTransactionDueFromToRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= crvn_AmountsDueInTwoThousandSixteenMember
January 5, 2012 [Member]  
Related Party Transaction [Line Items]  
Amounts paid 495,982us-gaap_RelatedPartyTransactionDueFromToRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= crvn_AmountsDueInTwoThousandThirteenMember
January 5, 2013 [Member]  
Related Party Transaction [Line Items]  
Amounts paid 440,873us-gaap_RelatedPartyTransactionDueFromToRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= crvn_AmountsDueInTwoThousandThirteenOneMember
January 5, 2014 [Member]  
Related Party Transaction [Line Items]  
Amounts paid 385,764us-gaap_RelatedPartyTransactionDueFromToRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= crvn_AmountsDueInTwoThousandFourteenMember
January 5, 2015 [Member]  
Related Party Transaction [Line Items]  
Amounts paid 330,655us-gaap_RelatedPartyTransactionDueFromToRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= crvn_AmountsDueInTwoThousandFifteenMember
Amounts due [Member]  
Related Party Transaction [Line Items]  
Amounts paid $ 1,928,820us-gaap_RelatedPartyTransactionDueFromToRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= crvn_AmountsDueMember