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Short-term Investments (Details) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]    
Short-term investments $ 37,101,506us-gaap_AvailableForSaleSecuritiesCurrent $ 45,621,593us-gaap_AvailableForSaleSecuritiesCurrent
Certificates of Deposit [Member] | Maturity date of August 27, 2015 [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Short-term investments 15,000,000us-gaap_AvailableForSaleSecuritiesCurrent
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CertificatesOfDepositMember
/ us-gaap_RangeAxis
= cytr_MaturityDateOneMemberMember		  
Certificates of Deposit [Member] | Maturity Date of April 30, 2015 [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Short-term investments 12,100,000us-gaap_AvailableForSaleSecuritiesCurrent
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CertificatesOfDepositMember
/ us-gaap_RangeAxis
= cytr_MaturityDateSevenMember		  
Certificates of Deposit [Member] | Maturity Date of April 23, 2015 [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Short-term investments $ 10,000,000us-gaap_AvailableForSaleSecuritiesCurrent
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CertificatesOfDepositMember
/ us-gaap_RangeAxis
= cytr_MaturityDateSixMember