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CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
 12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Cash Flows From Operating Activities    
Net loss $ (6,691,000)us-gaap_NetIncomeLoss $ (3,118,000)us-gaap_NetIncomeLoss
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation 1,000us-gaap_Depreciation 2,000us-gaap_Depreciation
Stock-based compensation 1,079,000us-gaap_ShareBasedCompensation 0us-gaap_ShareBasedCompensation
Changes in operating assets and liabilities:    
Prepaid expenses (163,000)us-gaap_IncreaseDecreaseInPrepaidExpense 1,000us-gaap_IncreaseDecreaseInPrepaidExpense
Accounts payable and accrued expenses 388,000us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities 146,000us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
Net Cash Used in Operating Activities (5,386,000)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations (2,969,000)us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
Cash Flows From Investing Activities    
Purchases of property and equipment (156,000)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment 0us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Net Cash Used in Investing Activities (156,000)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations 0us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
Cash Flows From Financing Activities    
Advances from Former Parent 0us-gaap_ProceedsFromRelatedPartyDebt 1,453,000us-gaap_ProceedsFromRelatedPartyDebt
Repayment of Former Parent advances (537,000)us-gaap_RepaymentsOfRelatedPartyDebt (916,000)us-gaap_RepaymentsOfRelatedPartyDebt
Proceeds from issuance of common stock and warrants less issuance costs 865,000us-gaap_ProceedsFromIssuanceOrSaleOfEquity [1] 16,228,000us-gaap_ProceedsFromIssuanceOrSaleOfEquity [1]
Investment from Former Parent 0rtgn_InvestmentFromRelatedParty 1,679,000rtgn_InvestmentFromRelatedParty
Net Cash Provided by Financing Activities 328,000us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations 18,444,000us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
Net (Decrease) Increase In Cash (5,214,000)us-gaap_CashPeriodIncreaseDecrease 15,475,000us-gaap_CashPeriodIncreaseDecrease
Cash - Beginning 15,571,000us-gaap_Cash 96,000us-gaap_Cash
Cash - Ending $ 10,357,000us-gaap_Cash $ 15,571,000us-gaap_Cash
[1] During the year ended March 31, 2015, gross proceeds from the initial public offering of $1,117,000 less $252,000 of offering costs, of which $89,000 was withheld from the proceeds and $163,000 was paid in cash that was previously accrued at March 31, 2014. During the year ended March 31, 2014, gross proceeds from the initial public offering of $19,216,000 less $3,195,000 of offering costs, of which $2,826,000 was withheld from the proceeds, $206,000 was paid in cash (including $44,000 paid during the fiscal year ended March 31, 2013) and $163,000 was accrued as of March 31, 2014.