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Common Stock Options (Details) (USD $)
3 Months Ended
Mar. 31, 2015
Options Outstanding  
Options outstanding - beginning balance 185,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber
Options granted   
Options oustanding - ending balance 185,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber
Options exercisable 85,000rcar_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisable
Weighted average exercise price  
Options outstanding - beginning balance $ 0.83us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
Options granted   
Options outstanding - ending balance $ 0.83us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
Options exercisable $ 0.72us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
Weighted average remaining contracted term  
Warrants outstanding - beginning balance 9 years 1 month 13 days
Warrants outstanding - ending balance 8 years 10 months 13 days
Warrants exercisable 8 years 11 months 16 days
Aggregate intrinsic value  
Options outstanding - beginning balance $ 9,300us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding
Options granted 0rcar_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueGranted
Options outstanding - ending balance 110,800us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding
Options exercisable $ 22,500rcar_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueExercisable