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Stockholders' Equity (Details) (USD $)
12 Months Ended
Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Warrants Outstanding, March 31, 2015 3,145,650us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber
Number of Warrants Exercisable, March 31, 2015 3,140,250rtgn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentOtherThanOptionsEquityInstrumentsExercisableNumber
Warrants Exercisable Weighted Average Remaining Life 1 year 1 month 6 days
Warrant [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Warrants Outstanding, March 31, 2014 3,140,250us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Number of Warrants Granted 5,400us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Number of Warrants Exercised 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Number of Warrants Forfeited 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Number of Warrants Outstanding, March 31, 2015 3,145,650us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Number of Warrants Exercisable, March 31, 2015 3,140,250rtgn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentOtherThanOptionsEquityInstrumentsExercisableNumber
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Weighted Average Exercise Price Outstanding, March 31, 2014 7.30rtgn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentOtherThanOptionsEquityInstrumentsOutstandingWeightedAverageExercisePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Weighted Average Exercise Price Granted 9.06rtgn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentOtherThanOptionsEquityInstrumentsGrantedWeightedAverageExercisePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Weighted Average Exercise Price, Exercised 0rtgn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentOtherThanOptionsEquityInstrumentsExercisedWeightedAverageExercisePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Weighted Average Exercise Price Forfeited 0rtgn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentOtherThanOptionsEquityInstrumentsForfeitedWeightedAverageExercisePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Weighted Average Exercise Price Outstanding, March 31, 2015 7.31rtgn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentOtherThanOptionsEquityInstrumentsOutstandingWeightedAverageExercisePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Weighted Average Exercise Price Exercisable, March 31, 2015 7.30rtgn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentOtherThanOptionsEquityInstrumentsExercisableWeightedAverageExercisePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Weighted Average Remaining Life Outstanding, March 31, 2015 1 year 1 month 6 days
Warrants Exercisable Weighted Average Remaining Life 1 year 1 month 6 days
Intrinsic Value Outstanding, March 31, 2015 0us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Intrinsic Value Exercisable, March 31, 2015 0rtgn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueExercisable
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember