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Statement of Stockholders' Equity (Deficit) (USD $)
Total
Preferred Stock
Common Stock
Additional Paid-In Capital
Subscriptions Payable
Accumulated Other Comprehensive Income (Loss)
Accumulated Deficit
Beginning Balance at Dec. 31, 2012 $ 150,965us-gaap_StockholdersEquity $ 100us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
$ 20,059us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
$ 1,352,322us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
$ 75,324us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= crvn_SubscriptionsPayableMember
$ (19,661)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
$ (1,277,179)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDeficitDuringDevelopmentStageMember
Beginning Balance, Shares at Dec. 31, 2012   100,000us-gaap_SharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
20,058,646us-gaap_SharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Units of common stock and warrants sold for cash 1,083,713crvn_StockIssuedDuringPeriodValueCommonStockAndWarrants    1,867crvn_StockIssuedDuringPeriodValueCommonStockAndWarrants
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
1,157,170crvn_StockIssuedDuringPeriodValueCommonStockAndWarrants
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
(75,324)crvn_StockIssuedDuringPeriodValueCommonStockAndWarrants
/ us-gaap_StatementEquityComponentsAxis
= crvn_SubscriptionsPayableMember
     
Units of common stock and warrants sold for cash, Shares      1,867,465crvn_StockIssuedDuringPeriodSharesCommonStockAndWarrants
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Loss on foreign currency translation (24,610)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax             (24,610)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
  
Net loss (477,818)us-gaap_NetIncomeLoss                (477,818)us-gaap_NetIncomeLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDeficitDuringDevelopmentStageMember
Ending Balance at Dec. 31, 2013 732,250us-gaap_StockholdersEquity 100us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
21,926us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
2,509,492us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
   (44,271)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
(1,754,997)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDeficitDuringDevelopmentStageMember
Ending Balance, Shares at Dec. 31, 2013   100,000us-gaap_SharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
21,926,111us-gaap_SharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Units of common stock and warrants sold for cash 314,898crvn_StockIssuedDuringPeriodValueCommonStockAndWarrants    467crvn_StockIssuedDuringPeriodValueCommonStockAndWarrants
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
314,431crvn_StockIssuedDuringPeriodValueCommonStockAndWarrants
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
        
Units of common stock and warrants sold for cash, Shares      466,517crvn_StockIssuedDuringPeriodSharesCommonStockAndWarrants
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Loss on foreign currency translation (23,824)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax            (23,824)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
  
Net loss (790,506)us-gaap_NetIncomeLoss                (790,506)us-gaap_NetIncomeLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDeficitDuringDevelopmentStageMember
Ending Balance at Dec. 31, 2014 $ 232,818us-gaap_StockholdersEquity $ 100us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
$ 22,393us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
$ 2,823,923us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
   $ (68,095)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
$ (2,545,503)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDeficitDuringDevelopmentStageMember
Ending Balance, Shares at Dec. 31, 2014   100,000us-gaap_SharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
22,392,628us-gaap_SharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember