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Basis of Presentation and Significant Accounting Policies (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
Mar. 07, 2014
Dec. 31, 2014
segment
May 24, 2011
item
Oct. 31, 2012
Basis of Presentation and Significant Accounting Policies                  
Number of operating segments             1us-gaap_NumberOfOperatingSegments    
Number of reportable segments             1us-gaap_NumberOfReportableSegments    
Reverse stock split           0.01us-gaap_StockholdersEquityNoteStockSplitConversionRatio1      
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    
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