XML 18 R28.htm IDEA: XBRL DOCUMENT v2.4.1.9
Common Stock Options (Details 2) (USD $)
12 Months Ended
Dec. 31, 2014
Mar. 31, 2015
Dec. 31, 2013
Number Outstanding 185,000rcar_NumberOutstanding    
Weighted Average Remaining Contractual Life (Years) 9 years 1 month 13 days    
Weighted Average Exercise Price $ 0.83us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice $ 0.83us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice $ 0.70us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
Number Exercisable 85,000rcar_NumberExercisable    
Weighted Average Remaining Contractual Life (Years) 8 years 11 months 16 days    
Weighted Average Exercise Price 0.72rcar_WeightedAverageExercisePrice    
$0.50 to $1.00 [Member]      
Number Outstanding 130,000rcar_NumberOutstanding
/ us-gaap_PlanNameAxis
= rcar_StockIncentivePlanOneMember
   
Weighted Average Remaining Contractual Life (Years) 9 years 26 days    
Weighted Average Exercise Price $ 0.74us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= rcar_StockIncentivePlanOneMember
   
Number Exercisable 85,000rcar_NumberExercisable
/ us-gaap_PlanNameAxis
= rcar_StockIncentivePlanOneMember
   
Weighted Average Remaining Contractual Life (Years) 8 years 11 months 16 days    
Weighted Average Exercise Price 0.72rcar_WeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= rcar_StockIncentivePlanOneMember
   
$1.01 to $1.50 [Member]      
Number Outstanding 55,000rcar_NumberOutstanding
/ us-gaap_PlanNameAxis
= rcar_StockIncentivePlanTwoMember
   
Weighted Average Remaining Contractual Life (Years) 9 years 3 months    
Weighted Average Exercise Price $ 1.05us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= rcar_StockIncentivePlanTwoMember
   
Number Exercisable 0rcar_NumberExercisable
/ us-gaap_PlanNameAxis
= rcar_StockIncentivePlanTwoMember
   
Weighted Average Exercise Price