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Notes Payable (Details Textual)
1 Months Ended 12 Months Ended 12 Months Ended
Apr. 29, 2013
USD ($)
Apr. 29, 2013
CAD
Mar. 26, 2013
CAD
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Dec. 31, 2014
CAD
Dec. 31, 2014
Building [Member]
Apr. 29, 2013
Building [Member]
CAD
Dec. 31, 2014
March 29, 2015 [Member]
CAD
Dec. 31, 2014
March 29, 2016 [Member]
CAD
Notes Payable (Textual)                    
Interest expense       $ 7,494us-gaap_InterestExpense $ 4,943us-gaap_InterestExpense          
Purchase price of the Property       270,260us-gaap_PropertyPlantAndEquipmentGross 293,125us-gaap_PropertyPlantAndEquipmentGross     300,000us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingMember
   
Building purchase payable           150,000us-gaap_NotesPayable     75,000us-gaap_NotesPayable
/ us-gaap_StatementScenarioAxis
= crvn_MarchTwentyNineTwoThousandFifteenMember
75,000us-gaap_NotesPayable
/ us-gaap_StatementScenarioAxis
= crvn_MarchTwentyNineTwoThousandSixteenMember
Payment to acquire on plant and property   125,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment 25,000us-gaap_PaymentsToAcquirePropertyPlantAndEquipment              
Purchase agreement, terms The Purchase Agreement contains a negative covenant that restricts the Company from taking out an additional mortgage on the Property of more than 80% of the Property's market value, if the Property's market value is less than $750,000 CAD. The Purchase Agreement contains a negative covenant that restricts the Company from taking out an additional mortgage on the Property of more than 80% of the Property's market value, if the Property's market value is less than $750,000 CAD.                
Effective interest rate on amount due under the Purchase Agreement 5.95%crvn_AmountDueUnderPurchaseAgreementInterestRateEffectivePercentage 5.95%crvn_AmountDueUnderPurchaseAgreementInterestRateEffectivePercentage                
Discount related to amount due under Purchase Agreement 19,235crvn_DiscountOnBuildingPurchasePayable                  
Additional expenses related to conditioning Property for use   33,361crvn_AdditionalExpensesRelatedToConditioningPropertyForUse                
Property plant and equipment useful life             18 years      
Estimated land associated with Purchase Agreement and Property   17,908us-gaap_RetailLandSalesDepositMethodPropertyCarryingValue                
Current portion, net discounts       4,625us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet 0us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet          
Note payable, less current portion, net discounts       $ 1,040us-gaap_DebtInstrumentUnamortizedDiscount $ 13,493us-gaap_DebtInstrumentUnamortizedDiscount