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| | | <Position> 39 </Position> |
| | | </Report> |
| | <Report instance="cytr-20151231.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R40.htm </HtmlFileName> |
| | | <LongName> 090700 - Disclosure - Equipment and Furnishings (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://cytrx.com/role/EquipmentAndFurnishingsDetails </Role> |
| | | <ShortName> Equipment and Furnishings (Details) </ShortName> |
| | | <MenuCategory> Uncategorized </MenuCategory> |
| | | <Position> 40 </Position> |
| | | </Report> |
| | <Report instance="cytr-20151231.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R41.htm </HtmlFileName> |
| | | <LongName> 090800 - Disclosure - Accrued Expenses and Other Current Liabilities (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://cytrx.com/role/AccruedExpensesAndOtherCurrentLiabilitiesDetails </Role> |
| | | <ShortName> Accrued Expenses and Other Current Liabilities (Details) </ShortName> |
| | | <MenuCategory> Uncategorized </MenuCategory> |
| | | <Position> 41 </Position> |
| | | </Report> |
| | <Report instance="cytr-20151231.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R42.htm </HtmlFileName> |
| | | <LongName> 090900 - Disclosure - Non-Cash litigation Settlement Due in Shares of Common Stock (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://cytrx.com/role/NoncashLitigationSettlementDueInSharesOfCommonStockDetails </Role> |
| | | <ShortName> Non-Cash litigation Settlement Due in Shares of Common Stock (Details) </ShortName> |
| | | <MenuCategory> Uncategorized </MenuCategory> |
| | | <Position> 42 </Position> |
| | | </Report> |
| | <Report instance="cytr-20151231.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R43.htm </HtmlFileName> |
| | | <LongName> 091000 - Disclosure - Warrant Liabilities (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://cytrx.com/role/WarrantLiabilitiesDetails </Role> |
| | | <ShortName> Warrant Liabilities (Details) </ShortName> |
| | | <MenuCategory> Uncategorized </MenuCategory> |
| | | <Position> 43 </Position> |
| | | </Report> |
| | <Report instance="cytr-20151231.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R44.htm </HtmlFileName> |
| | | <LongName> 091100 - Disclosure - Commitments and Contingencies (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://cytrx.com/role/CommitmentsAndContingenciesDetails </Role> |
| | | <ShortName> Commitments and Contingencies (Details) </ShortName> |
| | | <MenuCategory> Uncategorized </MenuCategory> |
| | | <Position> 44 </Position> |
| | | </Report> |
| | <Report instance="cytr-20151231.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R45.htm </HtmlFileName> |
| | | <LongName> 091200 - Disclosure - Equity Transactions (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://cytrx.com/role/EquityTransactionsDetails </Role> |
| | | <ShortName> Equity Transactions (Details) </ShortName> |
| | | <MenuCategory> Uncategorized </MenuCategory> |
| | | <Position> 45 </Position> |
| | | </Report> |
| | <Report instance="cytr-20151231.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R46.htm </HtmlFileName> |
| | | <LongName> 091300 - Disclosure - Stock Options and Equity-Classified Warrants (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://cytrx.com/role/StockOptionsAndEquityclassifiedWarrantsDetails </Role> |
| | | <ShortName> Stock Options and Equity-Classified Warrants (Details) </ShortName> |
| | | <MenuCategory> Uncategorized </MenuCategory> |
| | | <Position> 46 </Position> |
| | | </Report> |
| | <Report instance="cytr-20151231.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R47.htm </HtmlFileName> |
| | | <LongName> 091302 - Disclosure - Stock Options and Equity-Classified Warrants, Options by Exercise Price Range (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://cytrx.com/role/StockOptionsAndEquityclassifiedWarrantsOptionsByExercisePriceRangeDetails </Role> |
| | | <ShortName> Stock Options and Equity-Classified Warrants, Options by Exercise Price Range (Details) </ShortName> |
| | | <MenuCategory> Uncategorized </MenuCategory> |
| | | <Position> 47 </Position> |
| | | </Report> |
| | <Report instance="cytr-20151231.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R48.htm </HtmlFileName> |
| | | <LongName> 091304 - Disclosure - Stock Options and Equity-Classified Warrants, Warrants, Shares purchased and intrinsic value (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://cytrx.com/role/StockOptionsAndEquityclassifiedWarrantsWarrantsSharesPurchasedAndIntrinsicValueDetails </Role> |
| | | <ShortName> Stock Options and Equity-Classified Warrants, Warrants, Shares purchased and intrinsic value (Details) </ShortName> |
| | | <MenuCategory> Uncategorized </MenuCategory> |
| | | <Position> 48 </Position> |
| | | </Report> |
| | <Report instance="cytr-20151231.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R49.htm </HtmlFileName> |
| | | <LongName> 091400 - Disclosure - Stockholder Protection Rights Plan (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://cytrx.com/role/StockholderProtectionRightsPlanDetails </Role> |
| | | <ShortName> Stockholder Protection Rights Plan (Details) </ShortName> |
| | | <MenuCategory> Uncategorized </MenuCategory> |
| | | <Position> 49 </Position> |
| | | </Report> |
| | <Report instance="cytr-20151231.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R50.htm </HtmlFileName> |
| | | <LongName> 091500 - Disclosure - Income Taxes (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://cytrx.com/role/IncomeTaxesDetails </Role> |
| | | <ShortName> Income Taxes (Details) </ShortName> |
| | | <MenuCategory> Uncategorized </MenuCategory> |
| | | <Position> 50 </Position> |
| | | </Report> |
| | <Report instance="cytr-20151231.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R51.htm </HtmlFileName> |
| | | <LongName> 091600 - Disclosure - Quarterly Financial Data (unaudited) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://cytrx.com/role/QuarterlyFinancialDataUnauditedDetails </Role> |
| | | <ShortName> Quarterly Financial Data (unaudited) (Details) </ShortName> |
| | | <MenuCategory> Uncategorized </MenuCategory> |
| | | <Position> 51 </Position> |
| | | </Report> |
| | <Report instance="cytr-20151231.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R52.htm </HtmlFileName> |
| | | <LongName> 091700 - Disclosure - Subsequent Event (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://cytrx.com/role/SubsequentEventDetails </Role> |
| | | <ShortName> Subsequent Event (Details) </ShortName> |
| | | <MenuCategory> Uncategorized </MenuCategory> |
| | | <Position> 52 </Position> |
| | | </Report> |
| | <Report instance="cytr-20151231.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R53.htm </HtmlFileName> |
| | | <LongName> 091800 - Schedule - SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://cytrx.com/role/ScheduleIiValuationAndQualifyingAccountsDetails </Role> |
| | | <ShortName> SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) </ShortName> |
| | | <MenuCategory> Uncategorized </MenuCategory> |
| | | <Position> 53 </Position> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <LongName> All Reports </LongName> |
| | | <ReportType> Book </ReportType> |
| | | <ShortName> All Reports </ShortName> |
| | | </Report> |
| | </MyReports> |
| <InputFiles> |
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| | <File> cytr-20151231.xsd </File> |
| | <File> cytr-20151231_cal.xml </File> |
| | <File> cytr-20151231_def.xml </File> |
| | <File> cytr-20151231_lab.xml </File> |
| | <File> cytr-20151231_pre.xml </File> |
| | </InputFiles> |
| <SupplementalFiles/> |
| <BaseTaxonomies/> |
| <HasPresentationLinkbase> true </HasPresentationLinkbase> |
| <HasCalculationLinkbase> true </HasCalculationLinkbase> |
| </FilingSummary> |