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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (USD $)
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Deficit [Member]
Balance at Mar. 31, 2013 $ 47,000us-gaap_StockholdersEquity $ 200us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		 $ 597,800us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember		 $ (551,000)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
Balance (in shares) at Mar. 31, 2013   2,000,000us-gaap_SharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		    
Investment From Former Parent 1,679,000rtgn_InvestmentFromFormerParent 0rtgn_InvestmentFromFormerParent
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		 1,679,000rtgn_InvestmentFromFormerParent
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember		 0rtgn_InvestmentFromFormerParent
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
Shares and warrants issued for cash in connection with initial public offering 16,021,000rtgn_InitialPublicOfferinfgValueOfUnits 265rtgn_InitialPublicOfferinfgValueOfUnits
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		 16,020,735rtgn_InitialPublicOfferinfgValueOfUnits
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember		 0rtgn_InitialPublicOfferinfgValueOfUnits
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
Shares and warrants issued for cash in connection with initial public offering (in shares)   2,650,000rtgn_InitialPublicOfferingUnits1
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		    
Net loss (3,118,000)us-gaap_NetIncomeLoss 0us-gaap_NetIncomeLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		 0us-gaap_NetIncomeLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember		 (3,118,000)us-gaap_NetIncomeLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
Balance at Mar. 31, 2014 14,629,000us-gaap_StockholdersEquity 465us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		 18,297,535us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember		 (3,669,000)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
Balance (in shares) at Mar. 31, 2014   4,650,000us-gaap_SharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		    
Shares issued for cash in connection with underwriter's exercise of overallotment, net 1,028,000us-gaap_StockIssuedDuringPeriodValueIssuedForCash 15us-gaap_StockIssuedDuringPeriodValueIssuedForCash
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		 1,027,985us-gaap_StockIssuedDuringPeriodValueIssuedForCash
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember		 0us-gaap_StockIssuedDuringPeriodValueIssuedForCash
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
Shares issued for cash in connection with underwriter's exercise of overallotment, net (in shares)   154,290us-gaap_StockIssuedDuringPeriodSharesIssuedForCash
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		    
Stock-based compensation 1,079,000us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue 0us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		 1,079,000us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember		 0us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
Net loss (6,691,000)us-gaap_NetIncomeLoss 0us-gaap_NetIncomeLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		 0us-gaap_NetIncomeLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember		 (6,691,000)us-gaap_NetIncomeLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
Balance at Mar. 31, 2015 $ 10,045,000us-gaap_StockholdersEquity $ 480us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		 $ 20,404,520us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember		 $ (10,360,000)us-gaap_StockholdersEquity
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
Balance (in shares) at Mar. 31, 2015   4,804,290us-gaap_SharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember