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Stock Options, Restricted Stock and Warrants (Details) (USD $)
1 Months Ended 3 Months Ended 12 Months Ended 0 Months Ended 1 Months Ended 12 Months Ended
Jul. 30, 2014
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Sep. 09, 2014
Apr. 03, 2015
Mar. 31, 2000
Dec. 31, 2008
Jan. 30, 2015
Oct. 26, 2006
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Options expiration period   10 years                
Options outstanding, weighted average exercise price   $ 1.59us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice                
Non-vested stock options outstanding, Weighted average grant date fair value   $ 1.07us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue                
Number of restricted common stock granted   270,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod 270,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod              
Share-based compensation   $ 107,250us-gaap_ShareBasedCompensation $ 184,769us-gaap_ShareBasedCompensation              
Unrecognized compensation cost related to non-vested share-based compensation arrangements granted   637,950us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized                
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition   2 years 4 months 24 days                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value   $ 0.43us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue   $ 0.70us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue            
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Average Forfeiture Rate   7.00%rgdx_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAverageForfeitureRate [1]                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Beginning Balance   2,461,078us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber                
Line of Credit Facility, Commitment Fee Amount 750,000us-gaap_LineOfCreditFacilityCommitmentFeeAmount                  
SWK Credit Agreement [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Debt Instrument, Maturity Date Jul. 30, 2020                  
Common Stock [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value       0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
           
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value       7,605us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
           
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value       $ 0.32us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
           
Initial Warrant [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 681,090us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_ClassOfWarrantOrRightAxis
= rgdx_InitialWarrantMember
              681,090us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_ClassOfWarrantOrRightAxis
= rgdx_InitialWarrantMember
 
Fair Value Assumptions, Expected Term 6 years                  
First Amendment Warrant [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights   576,923us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_ClassOfWarrantOrRightAxis
= rgdx_FirstAmendmentWarrantMember
               
Fair Value Assumptions, Expected Term 6 years 6 years                
SG Financial LLC [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Line of Credit Facility, Commitment Fee Amount         1,029,412us-gaap_LineOfCreditFacilityCommitmentFeeAmount
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= rgdx_SgFinancialLlcMember
         
SG Financial LLC [Member] | Initial Warrant [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights         200,321us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_ClassOfWarrantOrRightAxis
= rgdx_InitialWarrantMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= rgdx_SgFinancialLlcMember
         
Subsequent Event [Member] | SWK Credit Agreement [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Line of Credit Facility, Commitment Fee Amount           2,000,000us-gaap_LineOfCreditFacilityCommitmentFeeAmount
/ us-gaap_CreditFacilityAxis
= rgdx_SwkCreditAgreementMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
       
Subsequent Event [Member] | First Amendment Warrant [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights           2,702,702us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
/ us-gaap_ClassOfWarrantOrRightAxis
= rgdx_FirstAmendmentWarrantMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
       
Maximum [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Average Forfeiture Rate   21.00%rgdx_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAverageForfeitureRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
               
Minimum [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Average Forfeiture Rate   0.00%rgdx_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAverageForfeitureRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
               
Stock Option Plan 2000 [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of shares authorized                   210,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= rgdx_StockOptionPlan2000Member
Stock option granted, number of common stock shares             1,600,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= rgdx_StockOptionPlan2000Member
     
Other Stock Plans [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Stock option granted, number of common stock shares             16,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= rgdx_OtherStockPlansMember
     
2006 Stock Plan [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of shares authorized   3,970,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= rgdx_StockPlan2006Member
              2,160,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= rgdx_StockPlan2006Member
Stock option granted, number of common stock shares   15,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= rgdx_StockPlan2006Member
               
Increase in the number of shares available for issuance   210,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= rgdx_StockPlan2006Member
          200,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= rgdx_StockPlan2006Member
   
Options outstanding, weighted average exercise price   $ 1.56us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= rgdx_StockPlan2006Member
  $ 1.62us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= rgdx_StockPlan2006Member
           
Stock option granted, exercise price   $ 0.43us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= rgdx_StockPlan2006Member
               
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant   1,508,922us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= rgdx_StockPlan2006Member
               
Percentage Of Common Stock Outstanding   5.00%rgdx_PercentageOfCommonStockOutstanding
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= rgdx_StockPlan2006Member
               
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares   1,027,992us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= rgdx_StockPlan2006Member
               
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value   150us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= rgdx_StockPlan2006Member
  0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= rgdx_StockPlan2006Member
           
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Beginning Balance   2,461,078us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= rgdx_StockPlan2006Member
  2,833,604us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= rgdx_StockPlan2006Member
           
Thomos Bologna [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Stock option granted, number of common stock shares   600,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
               
Share-based compensation   $ 0us-gaap_ShareBasedCompensation
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
$ 44,531us-gaap_ShareBasedCompensation
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
             
Thomos Bologna [Member] | Restricted Stock Units (RSUs) [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of restricted common stock granted   270,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
               
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares   300,000us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
               
Thomos Bologna [Member] | Restricted Stock Units (RSUs) [Member] | Minimum [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Common Stock, Average Closing Price   $ 2.40rgdx_CommonStockAverageClosingPrice
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockUnitsRSUMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
               
Thomos Bologna [Member] | Stock Option [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Options vesting period   36 months                
Thomos Bologna [Member] | Stock Option [Member] | Minimum [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Number of days, for calculating average closing price of common stock   30 days                
Thomos Bologna [Member] | Stock Option [Member] | Period One [Member]                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Stock option granted, exercise price   $ 1.20us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_OptionIndexedToIssuersEquityTypeAxis
= us-gaap_EmployeeStockOptionMember
/ rgdx_StockOptionsPeriodAxis
= rgdx_PeriodOneMember
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ChiefExecutiveOfficerMember
               
[1] Forfeiture range represents 0% for directors and 21% for employees.