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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
3 Months Ended 12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Dec. 31, 2013
Cash flows from operating activities        
Net loss $ (265,197)us-gaap_NetIncomeLoss $ (268,021)us-gaap_NetIncomeLoss $ (2,131,396)us-gaap_NetIncomeLoss $ (1,032,788)us-gaap_NetIncomeLoss
Adjustments to reconcile net loss to net cash flows from operating activities:        
Impairment loss 10,000us-gaap_GoodwillImpairmentLoss         
Stock based compensation expense 10,944us-gaap_ShareBasedCompensation 6,782us-gaap_ShareBasedCompensation 59,860us-gaap_ShareBasedCompensation 15,440us-gaap_ShareBasedCompensation
Stock based consulting expense    126,833rcar_StockBasedConsultingExpense 848,388rcar_StockBasedConsultingExpense 237,971rcar_StockBasedConsultingExpense
Gain on disposal of oil and gas properties          (49,338)us-gaap_GainLossOnDispositionOfAssets
Loss on disposal of subsidiary          453,581us-gaap_GainOrLossOnSaleOfStockInSubsidiary
Bad debt expense       80,000rcar_BadDebtExpense   
Changes in operating assets and liabilities:        
Decrease (increase) in receivables    (800)us-gaap_IncreaseDecreaseInAccountsReceivable    800us-gaap_IncreaseDecreaseInAccountsReceivable
Decrease (increase) in prepaid expenses (27,761)us-gaap_IncreaseDecreaseInPrepaidExpense (32,006)us-gaap_IncreaseDecreaseInPrepaidExpense (6,218)us-gaap_IncreaseDecreaseInPrepaidExpense 6,332us-gaap_IncreaseDecreaseInPrepaidExpense
(Decrease) increase in accounts payable and accrued expenses 56,577us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities 7,635us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities (42,004)us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities 18,104us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
(Decrease) increase in accounts payable and accrued expenses - related party 12,360us-gaap_IncreaseDecreaseInAccountsPayable         
(Decrease) increase in contract and contributions payable (109,375)rcar_DecreaseIncreaseInContractAndContributionPayable    365,625rcar_DecreaseIncreaseInContractAndContributionPayable   
Net cash flows from operating activities (312,452)us-gaap_NetCashProvidedByUsedInOperatingActivities (159,577)us-gaap_NetCashProvidedByUsedInOperatingActivities (825,745)us-gaap_NetCashProvidedByUsedInOperatingActivities (349,898)us-gaap_NetCashProvidedByUsedInOperatingActivities
Cash flows from investing activities:        
Proceeds from disposal of oil and gas properties        3,000us-gaap_ProceedsFromSaleOfOilAndGasPropertyAndEquipment
Acquisition of intellectual property        (162,854)rcar_AcquisitionOfIntellectualProperty
Net cash flows from investing activities        (159,854)us-gaap_NetCashProvidedByUsedInInvestingActivities
Cash flows from financing activities:        
Sale of common stock and warrants        1,505,000rcar_SaleOfCommonStockAndWarrants
Net cash flows from financing activities        1,505,000us-gaap_NetCashProvidedByUsedInFinancingActivities
Change in cash and cash equivalents (312,452)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease (159,577)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease 825,745us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease 995,248us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents, beginning of period 683,098us-gaap_CashAndCashEquivalentsAtCarryingValue 1,508,843us-gaap_CashAndCashEquivalentsAtCarryingValue 1,508,843us-gaap_CashAndCashEquivalentsAtCarryingValue 513,595us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents, end of period 370,646us-gaap_CashAndCashEquivalentsAtCarryingValue 1,349,266us-gaap_CashAndCashEquivalentsAtCarryingValue 683,098us-gaap_CashAndCashEquivalentsAtCarryingValue 1,508,843us-gaap_CashAndCashEquivalentsAtCarryingValue
Supplemental disclosure of cash flow information:        
Non-cash investing and financing activities - Note received on disposal of subsidiary          $ 80,000rcar_NoncashInvestingAndFinancingActivitiesNoteReceivedOnDisposalOfSubsidiary