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Accounts Payable and Accrued Expenses (Details) (USD $)
Mar. 31, 2015
Mar. 31, 2014
Accounts Payable And Accrued Expenses [Line Items]    
Accrued employee compensation $ 92,000us-gaap_AccruedEmployeeBenefitsCurrent $ 109,000us-gaap_AccruedEmployeeBenefitsCurrent
Accrued director compensation 43,000rtgn_AccruedDirectorCompensation 50,000rtgn_AccruedDirectorCompensation
Accrued legal fees 144,000rtgn_AccruedLegalFees 183,000rtgn_AccruedLegalFees
Accrued other professional fees 50,000us-gaap_AccruedProfessionalFeesCurrent 45,000us-gaap_AccruedProfessionalFeesCurrent
Accrued research and development fees 128,000rtgn_AccruedResearchAndDevelopmentCurrent 9,000rtgn_AccruedResearchAndDevelopmentCurrent
Accrued franchise taxes 146,000rtgn_AccruedFranchisesTaxes 0rtgn_AccruedFranchisesTaxes
Other accrued expenses 32,000us-gaap_AccountsPayableAndOtherAccruedLiabilitiesCurrent 14,000us-gaap_AccountsPayableAndOtherAccruedLiabilitiesCurrent
Total $ 635,000us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent $ 410,000us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent