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Stock Option Plans (Schedule of Awards to Mr. Bologna) (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of Awards 270,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod    
Exercise Price $ 2.07us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice    
Options Exercisable 1,498,929us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber    
Remaining Contractual Term 7 years 10 months 28 days 8 years 4 months 28 days 8 years 3 months 25 days
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
   
Intrinsic Value $ 0us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
   
Exercise Price $ 1.20us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
   
Options Exercisable 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
   
Remaining Contractual Term 7 years    
Thomos Bologna [Member] | Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of Awards 270,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
   
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 7 years    
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 7 years