Description of Company and Basis of Presentation	9 Months Ended
Sep. 30, 2017
Description of Company and Basis of Presentation [Abstract]
Description of Company and Basis of Presentation	1. Description of Company and Basis of Presentation CytRx Corporation ("we," "us," "our," CytRx" or the "company") is a biopharmaceutical research and development company specializing in oncology. Our focus is on the discovery, research and clinical development of novel anti-cancer drug candidates that employ novel linker technologies to enhance the accumulation and release of cytotoxic anti-cancer agents at the tumor. CytRx has an active drug discovery and research operation at our laboratory facilities in Freiburg, Germany. The LADR™ (Linker Activated Drug Release) technology platform is a discovery engine combining CytRx's expertise in linker chemistry and albumin biology to create a pipeline of anti-cancer molecules that will avoid unacceptable systemic toxicity while delivering highly potent agents directly to the tumor. We have created a "toolbox" of linker technologies that have the ability to significantly increase the therapeutic index of ultra-high potency drugs (10-1,000 times more potent than traditional chemotherapies) by controlling the release of the drug payloads and improving drug-like properties. After infusion, these ultra-high potency drug conjugates bind to circulating albumin for transport of the drug to the tumor. Subsequently, due to specific conditions within the tumor, the linkers are cleaved and release the anti-cancer drug payload. Our current efforts are focused on two classes of ultra-high potency drug conjugates. Our strategy across these programs is to generate additional pre-clinical data that will allow us to make informed decisions regarding the selection of one or both programs for moving into human clinical trials either independently or on a partnered basis. During 2017, CytRx's discovery laboratory synthesized and tested over 75 rationally designed drug conjugates with highly potent cytotoxic payloads, and two distinct classes of compounds have been created. To date, four lead candidates have been selected based on in vitro and animal preclinical studies, stability, and manufacturing feasibility. Additional animal efficacy and toxicology testing of these lead candidates is underway. On July 27, 2017, CytRx entered into an exclusive worldwide license with NantCell, Inc. ("NantCell"), granting them rights to develop, manufacture and commercialize aldoxorubicin in all indications. As part of the license, NantCell made a strategic investment of $13 million in CytRx common stock at $6.60 per share, a premium of 92% to the market price on that date. CytRx also issued NantCell a warrant to purchase up to 0.5 million shares of common stock at $6.60 over the next 18 months. CytRx is entitled to receive up to $343 million in fees contingent upon certain regulatory approvals and commercial milestones. CytRx is entitled to receive ascending double-digit royalties for net sales for soft tissue sarcomas and mid to high single digit royalties for other indications. Aldoxorubicin is a conjugate of the commonly prescribed chemotherapeutic agent doxorubicin that binds to circulating albumin in the bloodstream and is believed to concentrate the drug at the site of the tumor. Aldoxorubicin, our lead clinical candidate, has been tested in over 600 patients with various types of cancer. Specifically, it is comprised of (6-maleimidocaproyl) hydrazine, an acid-sensitive molecule that is conjugated to doxorubicin. The initial indication for aldoxorubicin is for patients with advanced soft tissue sarcomas (STS). In March 2017 CytRx met with the FDA to discuss a regulatory pathway for a New Drug Application (NDA) for aldoxorubicin in STS. Aldoxorubicin has received Orphan Drug Designation (ODD) by the U.S. FDA for the treatment of STS. ODD provides several benefits including seven years of market exclusivity after approval, certain R&D related tax credits, and protocol assistance by the FDA. European regulators also granted aldoxorubicin Orphan designation for STS, which confers ten years of market exclusivity among other benefits. Currently, our only research and development activities are conducted by Freiburg, Germany, our laboratory facilities. For this reason and others, our operating expenses are expected to be significantly lower in the near future. Therefore, period to period comparisons should not be relied upon as predictive of the results in future periods. The accompanying condensed financial statements at September 30, 2017 and for the three-month and nine-month periods ended September 30, 2017 and 2016, respectively, are unaudited, but include all adjustments, consisting of normal recurring entries, that management believes to be necessary for a fair presentation of the periods presented. Interim results are not necessarily indicative of results for a full year. Balance sheet amounts as of December 31, 2016 have been derived from the audited financial statements as of that date. The financial statements included herein have been prepared by us pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC"). Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted pursuant to such rules and regulations. The financial statements should be read in conjunction with the Company's audited financial statements contained in its Annual Report on Form 10-K for the year ended December 31, 2016. Effective November 1, 2017, the Company completed a 1-for-6 reverse stock split of the Company's outstanding shares of common and preferred stock, reduced its authorized shares of both common and preferred stock by one-sixth; no change was made to the per-share par value of the common stock. All share and per share amounts in the accompanying financial statements have been adjusted to reflect the reverse stock split as if it had occurred at the beginning of the earliest period presented.

1. Description of Company and Basis of Presentation

CytRx Corporation ("we," "us," "our," CytRx" or the "company") is a biopharmaceutical research and development company specializing in oncology. Our focus is on the discovery, research and clinical development of novel anti-cancer drug candidates that employ novel linker technologies to enhance the accumulation and release of cytotoxic anti-cancer agents at the tumor. CytRx has an active drug discovery and research operation at our laboratory facilities in Freiburg, Germany.

The LADR™ (Linker Activated Drug Release) technology platform is a discovery engine combining CytRx's expertise in linker chemistry and albumin biology to create a pipeline of anti-cancer molecules that will avoid unacceptable systemic toxicity while delivering highly potent agents directly to the tumor. We have created a "toolbox" of linker technologies that have the ability to significantly increase the therapeutic index of ultra-high potency drugs (10-1,000 times more potent than traditional chemotherapies) by controlling the release of the drug payloads and improving drug-like properties. After infusion, these ultra-high potency drug conjugates bind to circulating albumin for transport of the drug to the tumor. Subsequently, due to specific conditions within the tumor, the linkers are cleaved and release the anti-cancer drug payload.

Our current efforts are focused on two classes of ultra-high potency drug conjugates. Our strategy across these programs is to generate additional pre-clinical data that will allow us to make informed decisions regarding the selection of one or both programs for moving into human clinical trials either independently or on a partnered basis.

During 2017, CytRx's discovery laboratory synthesized and tested over 75 rationally designed drug conjugates with highly potent cytotoxic payloads, and two distinct classes of compounds have been created. To date, four lead candidates have been selected based on in vitro and animal preclinical studies, stability, and manufacturing feasibility. Additional animal efficacy and toxicology testing of these lead candidates is underway.

On July 27, 2017, CytRx entered into an exclusive worldwide license with NantCell, Inc. ("NantCell"), granting them rights to develop, manufacture and commercialize aldoxorubicin in all indications. As part of the license, NantCell made a strategic investment of $13 million in CytRx common stock at $6.60 per share, a premium of 92% to the market price on that date. CytRx also issued NantCell a warrant to purchase up to 0.5 million shares of common stock at $6.60 over the next 18 months. CytRx is entitled to receive up to $343 million in fees contingent upon certain regulatory approvals and commercial milestones. CytRx is entitled to receive ascending double-digit royalties for net sales for soft tissue sarcomas and mid to high single digit royalties for other indications.

Aldoxorubicin is a conjugate of the commonly prescribed chemotherapeutic agent doxorubicin that binds to circulating albumin in the bloodstream and is believed to concentrate the drug at the site of the tumor. Aldoxorubicin, our lead clinical candidate, has been tested in over 600 patients with various types of cancer. Specifically, it is comprised of (6-maleimidocaproyl) hydrazine, an acid-sensitive molecule that is conjugated to doxorubicin. The initial indication for aldoxorubicin is for patients with advanced soft tissue sarcomas (STS). In March 2017 CytRx met with the FDA to discuss a regulatory pathway for a New Drug Application (NDA) for aldoxorubicin in STS.

Aldoxorubicin has received Orphan Drug Designation (ODD) by the U.S. FDA for the treatment of STS. ODD provides several benefits including seven years of market exclusivity after approval, certain R&D related tax credits, and protocol assistance by the FDA. European regulators also granted aldoxorubicin Orphan designation for STS, which confers ten years of market exclusivity among other benefits.

Currently, our only research and development activities are conducted by Freiburg, Germany, our laboratory facilities. For this reason and others, our operating expenses are expected to be significantly lower in the near future. Therefore, period to period comparisons should not be relied upon as predictive of the results in future periods.

The accompanying condensed financial statements at September 30, 2017 and for the three-month and nine-month periods ended September 30, 2017 and 2016, respectively, are unaudited, but include all adjustments, consisting of normal recurring entries, that management believes to be necessary for a fair presentation of the periods presented. Interim results are not necessarily indicative of results for a full year. Balance sheet amounts as of December 31, 2016 have been derived from the audited financial statements as of that date.

The financial statements included herein have been prepared by us pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC"). Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted pursuant to such rules and regulations. The financial statements should be read in conjunction with the Company's audited financial statements contained in its Annual Report on Form 10-K for the year ended December 31, 2016.

Effective November 1, 2017, the Company completed a 1-for-6 reverse stock split of the Company's outstanding shares of common and preferred stock, reduced its authorized shares of both common and preferred stock by one-sixth; no change was made to the per-share par value of the common stock. All share and per share amounts in the accompanying financial statements have been adjusted to reflect the reverse stock split as if it had occurred at the beginning of the earliest period presented.