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Short-term Investments (Details) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]    
Short-term investments $ 45,621,593us-gaap_AvailableForSaleSecuritiesCurrent $ 27,084,980us-gaap_AvailableForSaleSecuritiesCurrent
Certificates of Deposit [Member] | Maturity date of February 26, 2015 [Member]    
Schedule of Available-for-sale Securities [Line Items]    
Short-term investments 23,500,000us-gaap_AvailableForSaleSecuritiesCurrent
/ cytr_AvailableForSaleSecuritiesByMaturityDateAxis
= cytr_MaturityDateOneMemberMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CertificatesOfDepositMember		  
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
/ cytr_AvailableForSaleSecuritiesByMaturityDateAxis
= cytr_MaturityDateTwoMemberMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CertificatesOfDepositMember		  
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
/ cytr_AvailableForSaleSecuritiesByMaturityDateAxis
= cytr_MaturityDateThreeMemberMember
/ us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis
= us-gaap_CertificatesOfDepositMember