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Stockholders' Equity (Deficit) (Details) (USD $)
0 Months Ended 12 Months Ended 0 Months Ended 1 Months Ended
Dec. 06, 2013
Dec. 31, 2014
Dec. 31, 2013
Oct. 24, 2014
Oct. 20, 2014
Sep. 29, 2014
Oct. 16, 2014
Sep. 23, 2014
Common stock, shares authorized   95,000,000us-gaap_CommonStockSharesAuthorized 95,000,000us-gaap_CommonStockSharesAuthorized          
Common stock, par value   $ 0.001us-gaap_CommonStockParOrStatedValuePerShare $ 0.001us-gaap_CommonStockParOrStatedValuePerShare          
Common stock, shares issued   22,392,628us-gaap_CommonStockSharesIssued 21,926,111us-gaap_CommonStockSharesIssued          
Common stock, shares outstanding   22,392,628us-gaap_CommonStockSharesOutstanding 21,926,111us-gaap_CommonStockSharesOutstanding          
Series A Preferred stock, shares authorized   5,000,000us-gaap_PreferredStockSharesAuthorized 5,000,000us-gaap_PreferredStockSharesAuthorized          
Series A Peferred stock, par value   $ 0.001us-gaap_PreferredStockParOrStatedValuePerShare $ 0.001us-gaap_PreferredStockParOrStatedValuePerShare          
Series A Preferred stock, shares issued   100,000us-gaap_PreferredStockSharesIssued 100,000us-gaap_PreferredStockSharesIssued          
Preferred stock, shares outstanding   100,000us-gaap_PreferredStockSharesOutstanding 100,000us-gaap_PreferredStockSharesOutstanding          
Term of warrants to purchase common stock 60 months              
Preferred stock, Voting rights   The Series A shareholder shall have such number of votes as is determined by multiplying: (a) the number of shares of Series A Preferred Stock held by such shareholder; (b) the sum of the number of issued and outstanding shares of Series A Preferred Stock, any other series of preferred and Common Stock on a fully diluted basis; and (c) 0.000006. The Series A Preferred Stock has no conversion, dividend, or liquidation rights.            
Proceeds from the sale of common stock   $ 314,898us-gaap_ProceedsFromIssuanceOfCommonStock $ 1,083,713us-gaap_ProceedsFromIssuanceOfCommonStock          
Warrants issued to purchase common stock     1,100,000crvn_WarrantIssuedToPurchaseCommonStock          
Warrants exercise price $ 0.75us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1   $ 0.75us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1          
Warrant Expiration Date     Dec. 06, 2018          
Total purchase price of warrants     660,000crvn_TotalPurchasePriceOfWarrants          
325,798 Series A-100 warrants [Member]                
Common stock, par value     $ 0.65us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_AwardTypeAxis
= crvn_SeriesAOneHundreadWarrantsMember
         
Common stock issued during the period     325,798us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_AwardTypeAxis
= crvn_SeriesAOneHundreadWarrantsMember
         
162,892 Series A-200 warrants [Member]                
Common stock, par value     $ 1.25us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_AwardTypeAxis
= crvn_SeriesATwoHundreadWarrantsMember
         
Common stock issued during the period     162,892us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_AwardTypeAxis
= crvn_SeriesATwoHundreadWarrantsMember
         
162,892 Series A-300 warrants [Member]                
Common stock, par value     $ 1.75us-gaap_CommonStockParOrStatedValuePerShare
/ us-gaap_AwardTypeAxis
= crvn_SeriesAThreeHundreadWarrantsMember
         
Common stock issued during the period     162,892us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_AwardTypeAxis
= crvn_SeriesAThreeHundreadWarrantsMember
         
Warrant [Member]                
Term of warrants to purchase common stock       36 months        
Common stock issued during the period     651,582us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
         
Proceeds from the sale of common stock     423,713us-gaap_ProceedsFromIssuanceOfCommonStock
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
         
Warrants issued to purchase common stock     1,100,000crvn_WarrantIssuedToPurchaseCommonStock
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
         
Warrants exercise price       $ 0.75us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
       
Warrant [Member] | 325,798 Series A-100 warrants [Member]                
Term of warrants to purchase common stock     36 months          
Warrants exercise price     $ 0.65us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_AwardTypeAxis
= crvn_SeriesAOneHundreadWarrantsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
         
Warrant [Member] | 162,892 Series A-200 warrants [Member]                
Term of warrants to purchase common stock     36 months          
Warrants exercise price     $ 1.25us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_AwardTypeAxis
= crvn_SeriesATwoHundreadWarrantsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
         
Warrant [Member] | 162,892 Series A-300 warrants [Member]                
Warrants exercise price     $ 1.75us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_AwardTypeAxis
= crvn_SeriesAThreeHundreadWarrantsMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
         
Common Stock Subscription [Member]                
Number of shares sold         74,075us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
3,704us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
   
Shares issued to investors, Shares         37,038us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
1,852us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
   
Share price         $ 0.75us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
$ 0.75us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
   
Term of warrants to purchase common stock         36 months 36 months    
Shares issued to investors, Value         50,000us-gaap_StockIssuedDuringPeriodValueOther
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
2,500us-gaap_StockIssuedDuringPeriodValueOther
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
   
Common Stock Subscription [Member] | Investors [Member]                
Number of shares sold       20,000us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsMember
       
Shares issued to investors, Shares       10,000us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsMember
       
Share price       $ 0.75us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsMember
       
Term of warrants to purchase common stock       36 months        
Shares issued to investors, Value       13,500us-gaap_StockIssuedDuringPeriodValueOther
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsMember
       
Common Stock Subscription [Member] | Investors 1 [Member]                
Number of shares sold         6,730us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsOneMember
     
Shares issued to investors, Shares         3,365us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsOneMember
     
Share price         $ 0.75us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsOneMember
     
Term of warrants to purchase common stock         36 months      
Shares issued to investors, Value         4,542us-gaap_StockIssuedDuringPeriodValueOther
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsOneMember
     
Common Stock Subscription [Member] | Investors 2 [Member]                
Number of shares sold         74,075us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsTwoMember
     
Shares issued to investors, Shares         37,038us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsTwoMember
     
Share price         $ 0.75us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsTwoMember
     
Term of warrants to purchase common stock         36 months      
Shares issued to investors, Value         50,000us-gaap_StockIssuedDuringPeriodValueOther
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsTwoMember
     
Common Stock Subscription [Member] | Investors 3 [Member]                
Number of shares sold             2,000us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsThreeMember
 
Shares issued to investors, Shares             10,000us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsThreeMember
 
Share price             $ 0.75us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsThreeMember
 
Term of warrants to purchase common stock             36 months  
Shares issued to investors, Value             13,500us-gaap_StockIssuedDuringPeriodValueOther
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsThreeMember
 
Common Stock Subscription [Member] | Investors 4 [Member]                
Number of shares sold           3,704us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsFourMember
   
Shares issued to investors, Shares           1,852us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsFourMember
   
Share price           $ 0.75us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsFourMember
   
Term of warrants to purchase common stock           36 months    
Shares issued to investors, Value           2,500us-gaap_StockIssuedDuringPeriodValueOther
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsFourMember
   
Common Stock Subscription [Member] | Investors 5 [Member]                
Number of shares sold               2,000us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsFiveMember
Shares issued to investors, Shares               1,000us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsFiveMember
Share price               $ 0.75us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsFiveMember
Term of warrants to purchase common stock               36 months
Shares issued to investors, Value               1,350us-gaap_StockIssuedDuringPeriodValueOther
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsFiveMember
Common Stock Subscription [Member] | Investors 6 [Member]                
Number of shares sold           134,289us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsSixMember
   
Shares issued to investors, Shares           67,145us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsSixMember
   
Share price           $ 0.75us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsSixMember
   
Term of warrants to purchase common stock           36 months    
Shares issued to investors, Value           90,645us-gaap_StockIssuedDuringPeriodValueOther
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsSixMember
   
Common Stock Subscription [Member] | Investors 7 [Member]                
Number of shares sold           134,289us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsSevenMember
   
Shares issued to investors, Shares           67,145us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsSevenMember
   
Share price           $ 0.75us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsSevenMember
   
Term of warrants to purchase common stock           36 months    
Shares issued to investors, Value           90,645us-gaap_StockIssuedDuringPeriodValueOther
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsSevenMember
   
Common Stock Subscription [Member] | Investors 8 [Member]                
Number of shares sold           13,493us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsEightMember
   
Shares issued to investors, Shares           6,747us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsEightMember
   
Share price           $ 0.75us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsEightMember
   
Term of warrants to purchase common stock           36 months    
Shares issued to investors, Value           9,108us-gaap_StockIssuedDuringPeriodValueOther
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsEightMember
   
Common Stock Subscription [Member] | Investors 9 [Member]                
Number of shares sold           13,493us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsNineMember
   
Shares issued to investors, Shares           6,747us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsNineMember
   
Share price           $ 0.75us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsNineMember
   
Term of warrants to purchase common stock           36 months    
Shares issued to investors, Value           9,107us-gaap_StockIssuedDuringPeriodValueOther
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsNineMember
   
Common Stock Subscription [Member] | Investors 10 [Member]                
Number of shares sold           22,222us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsTenMember
   
Shares issued to investors, Shares           11,111us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsTenMember
   
Share price           $ 0.75us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsTenMember
   
Term of warrants to purchase common stock           36 months    
Shares issued to investors, Value           15,000us-gaap_StockIssuedDuringPeriodValueOther
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsTenMember
   
Common Stock Subscription [Member] | Investors 11 [Member]                
Number of shares sold           22,222us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsElevenMember
   
Shares issued to investors, Shares           11,111us-gaap_StockIssuedDuringPeriodSharesOther
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsElevenMember
   
Share price           $ 0.75us-gaap_SharePrice
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsElevenMember
   
Term of warrants to purchase common stock           36 months    
Shares issued to investors, Value           $ 15,000us-gaap_StockIssuedDuringPeriodValueOther
/ us-gaap_StatementClassOfStockAxis
= crvn_CommonStockSubscriptionMember
/ us-gaap_TitleOfIndividualAxis
= crvn_InvestorsElevenMember