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Stock Options, Restricted Stock and Warrants (Schedule of Awards to Mr. Bologna) (Details) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of Awards 270,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod 270,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Thomos Bologna [Member] | Restricted Stock Units (RSUs) [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Grant Date Dec. 21, 2011  
Number of Awards 270,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
 
Intrinsic Value 0us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
 
Exercise Price 1.20us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
 
Options Exercisable 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
 
Remaining Contractual Term 6 years 9 months  
Employee Stock Option [Member] | Thomos Bologna [Member] | Period One [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Grant Date Dec. 21, 2011  
Number of Awards 600,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= us-gaap_EmployeeStockOptionMember
/ rgdx_PeriodAxis
= rgdx_PeriodOneMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
 
Intrinsic Value 0us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= us-gaap_EmployeeStockOptionMember
/ rgdx_PeriodAxis
= rgdx_PeriodOneMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
 
Exercise Price 1.20us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= us-gaap_EmployeeStockOptionMember
/ rgdx_PeriodAxis
= rgdx_PeriodOneMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
 
Options Exercisable 600,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= us-gaap_EmployeeStockOptionMember
/ rgdx_PeriodAxis
= rgdx_PeriodOneMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
 
Remaining Contractual Term 6 years 9 months  
Employee Stock Option [Member] | Thomos Bologna [Member] | Period Two [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Grant Date Dec. 21, 2011  
Number of Awards 300,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= us-gaap_EmployeeStockOptionMember
/ rgdx_PeriodAxis
= rgdx_PeriodTwoMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
 
Intrinsic Value 0us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= us-gaap_EmployeeStockOptionMember
/ rgdx_PeriodAxis
= rgdx_PeriodTwoMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
 
Exercise Price 1.20us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= us-gaap_EmployeeStockOptionMember
/ rgdx_PeriodAxis
= rgdx_PeriodTwoMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
 
Options Exercisable 300,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= us-gaap_EmployeeStockOptionMember
/ rgdx_PeriodAxis
= rgdx_PeriodTwoMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
 
Remaining Contractual Term 6 years 9 months