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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $)
Common Stock
Additional Paid-In Capital
Accumulated deficit
Accumulated other comprehensive (loss)
Total
Beginning Balance, Amount at Dec. 31, 2012 $ 631us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
$ 5,462,236us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
$ (4,491,004)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= rcar_AccumulatedDeficitMember
$ (4,104)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= rcar_AccumulatedOtherComprehensiveLossMember
$ 967,759us-gaap_StockholdersEquity
Beginning Balance, Shares at Dec. 31, 2012 63,075,122us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Stock based compensation - Series A Warrant    237,971rcar_StockBasedCompensation
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     237,971rcar_StockBasedCompensation
Stock based compensation - options    15,440rcar_StockBasedCompensationOptions
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     15,440rcar_StockBasedCompensationOptions
Issuance of Units, shares 3,500,000rcar_IssuanceOfUnits
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Issuance of Units, Value 35rcar_CommonUnitIssuance
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
1,504,965rcar_CommonUnitIssuance
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     1,505,000rcar_CommonUnitIssuance
Reclassification adjustment on disposal of subsidiary         4,104us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= rcar_AccumulatedOtherComprehensiveLossMember
4,104us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Net Loss       (1,032,788)us-gaap_NetIncomeLoss
/ us-gaap_StatementEquityComponentsAxis
= rcar_AccumulatedDeficitMember
  (1,032,788)us-gaap_NetIncomeLoss
Ending Balance, Amount at Dec. 31, 2013 666us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
7,220,612us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
(5,523,792)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= rcar_AccumulatedDeficitMember
   1,697,486us-gaap_StockholdersEquity
Ending Balance, Shares at Dec. 31, 2013 66,575,122us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Stock based compensation - Series A Warrant    848,388rcar_StockBasedCompensation
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     848,388rcar_StockBasedCompensation
Stock based compensation - options    59,860rcar_StockBasedCompensationOptions
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     59,860rcar_StockBasedCompensationOptions
Reclassification adjustment on disposal of subsidiary           
Net Loss       (2,131,396)us-gaap_NetIncomeLoss
/ us-gaap_StatementEquityComponentsAxis
= rcar_AccumulatedDeficitMember
   (2,131,396)us-gaap_NetIncomeLoss
Ending Balance, Amount at Dec. 31, 2014 $ 666us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
$ 8,128,860us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
$ (7,655,188)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= rcar_AccumulatedDeficitMember
   $ 474,338us-gaap_StockholdersEquity
Ending Balance, Shares at Dec. 31, 2014 66,575,122us-gaap_SharesIssued
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember