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Derivative Liabilities (Details ) (USD $)
 0 Months Ended 12 Months Ended 0 Months Ended 1 Months Ended
Jul. 10, 2014
Jun. 13, 2014
May 21, 2014
May 06, 2014
Apr. 29, 2014
Dec. 31, 2014
Dec. 31, 2013
May 06, 2013
May 24, 2011
item
Oct. 31, 2012
Derivative Liabilities                    
Number of shares sold pursuant to the Purchase Agreement 50,000us-gaap_StockIssuedDuringPeriodSharesNewIssues 1,778,750us-gaap_StockIssuedDuringPeriodSharesNewIssues 872,310us-gaap_StockIssuedDuringPeriodSharesNewIssues 3,418,125us-gaap_StockIssuedDuringPeriodSharesNewIssues 2,776,500us-gaap_StockIssuedDuringPeriodSharesNewIssues 8,895,685us-gaap_StockIssuedDuringPeriodSharesNewIssues        
Purchase price of shares sold pursuant to the Purchase Agreement           $ 31,849,967us-gaap_StockIssuedDuringPeriodValueNewIssues        
Gain on decrease in fair value of derivative liability             8,980,077us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1      
Warrant                    
Derivative Liabilities                    
Gain on decrease in fair value of derivative liability               8,980,077us-gaap_ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_WarrantMember		    
Gain on extinguishment of derivative liability               1,635,967resx_GainOnDiscontinuationOfFairValueHedge
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_WarrantMember		    
Series E Preferred Stock                    
Derivative Liabilities                    
Number of investors with whom the Purchase Agreement is entered into                 8resx_PreferredStockSharesIssuedNumberOfInvestors
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesEPreferredStockMember		  
Number of shares sold pursuant to the Purchase Agreement                 8,700us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesEPreferredStockMember		 1,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesEPreferredStockMember
Purchase price of shares sold pursuant to the Purchase Agreement (in dollars per share)                 $ 1,000us-gaap_SharesIssuedPricePerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesEPreferredStockMember		  
Purchase price of shares sold pursuant to the Purchase Agreement                 $ 8,700,000us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesEPreferredStockMember		 $ 1,000,000us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementClassOfStockAxis
= us-gaap_SeriesEPreferredStockMember