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Stockholders' Equity (Details 1) (USD $)
12 Months Ended
Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Warrants Outstanding Number of Warrants 3,145,650us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber
Warrants Exercisable Weighted Average Remaining Life 1 year 1 month 6 days
Warrants Exercisable Number of Warrants 3,140,250rtgn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentOtherThanOptionsEquityInstrumentsExercisableNumber
Exercise Price Range One [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Warrants Outstanding Exercise Price 7.2500us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_RangeAxis
= rtgn_ExercisePriceRangeOneMember
Warrants Outstanding Number of Warrants 3,047,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber
/ us-gaap_RangeAxis
= rtgn_ExercisePriceRangeOneMember
Warrants Exercisable Weighted Average Remaining Life 1 year
Warrants Exercisable Number of Warrants 3,047,500rtgn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentOtherThanOptionsEquityInstrumentsExercisableNumber
/ us-gaap_RangeAxis
= rtgn_ExercisePriceRangeOneMember
Exercise Price Range Two [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Warrants Outstanding Exercise Price 9.0625us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
/ us-gaap_RangeAxis
= rtgn_ExercisePriceRangeTwoMember
Warrants Outstanding Number of Warrants 98,150us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber
/ us-gaap_RangeAxis
= rtgn_ExercisePriceRangeTwoMember
Warrants Exercisable Weighted Average Remaining Life 4 years
Warrants Exercisable Number of Warrants 92,750rtgn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentOtherThanOptionsEquityInstrumentsExercisableNumber
/ us-gaap_RangeAxis
= rtgn_ExercisePriceRangeTwoMember