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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 | $ 47,000 us-gaap_StockholdersEquity | $ 200 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 597,800 us-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 |  | 2,000,000 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |
Investment From Former Parent | 1,679,000 rtgn_InvestmentFromFormerParent | 0 rtgn_InvestmentFromFormerParent / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 1,679,000 rtgn_InvestmentFromFormerParent / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 rtgn_InvestmentFromFormerParent / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Shares and warrants issued for cash in connection with initial public offering | 16,021,000 rtgn_InitialPublicOfferinfgValueOfUnits | 265 rtgn_InitialPublicOfferinfgValueOfUnits / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 16,020,735 rtgn_InitialPublicOfferinfgValueOfUnits / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 rtgn_InitialPublicOfferinfgValueOfUnits / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Shares and warrants issued for cash in connection with initial public offering (in shares) |  | 2,650,000 rtgn_InitialPublicOfferingUnits1 / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |
Net loss | (3,118,000)us-gaap_NetIncomeLoss | 0 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-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 | 14,629,000 us-gaap_StockholdersEquity | 465 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 18,297,535 us-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 |  | 4,650,000 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |
Shares issued for cash in connection with underwriter's exercise of overallotment, net | 1,028,000 us-gaap_StockIssuedDuringPeriodValueIssuedForCash | 15 us-gaap_StockIssuedDuringPeriodValueIssuedForCash / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 1,027,985 us-gaap_StockIssuedDuringPeriodValueIssuedForCash / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_StockIssuedDuringPeriodValueIssuedForCash / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Shares issued for cash in connection with underwriter's exercise of overallotment, net (in shares) |  | 154,290 us-gaap_StockIssuedDuringPeriodSharesIssuedForCash / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |
Stock-based compensation | 1,079,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 1,079,000 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Net loss | (6,691,000)us-gaap_NetIncomeLoss | 0 us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 0 us-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 | $ 10,045,000 us-gaap_StockholdersEquity | $ 480 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 20,404,520 us-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 |  | 4,804,290 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |

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