Description of Company and Basis of Presentation	9 Months Ended
Sep. 30, 2019
Accounting Policies [Abstract]
Description of Company and Basis of Presentation	1. Description of Company and Basis of Presentation CytRx Corporation (“CytRx”) is a biopharmaceutical research and development company specializing in oncology and rare diseases. The Company’s focus has been 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. During 2017, CytRx’s discovery laboratory, located in Freiburg, Germany, synthesized and tested over 75 rationally designed drug conjugates with highly potent payloads, culminating in the creation of two distinct classes of compounds. Four lead candidates (LADR-7 through LADR-10) were selected based on in vitro and animal preclinical studies, stability, and manufacturing feasibility. In 2018, additional animal efficacy and toxicology testing of these lead candidates was conducted. In addition, a novel albumin companion diagnostic, ACDx™, was developed to identify patients with cancer who are most likely to benefit from treatment with these drug candidates. On June 1, 2018, CytRx launched Centurion BioPharma Corporation (“Centurion”), a private wholly owned subsidiary, and transferred all of its assets, liabilities and personnel associated with the laboratory operations in Freiburg, Germany. In connection with said transfer, the Company and Centurion entered into a Management Services Agreement whereby the Company agreed to render advisory, consulting, financial and administrative services to Centurion, for which Centurion shall reimburse the Company for the cost of such services plus a 5% service charge. The Management Services Agreement may be terminated by either party at any time. Centurion is focused on the development of personalized medicine for solid tumor treatment. On December 21, 2018, CytRx announced that Centurion had concluded the pre-clinical phase of development for its four LADR drug candidates, and for its albumin companion diagnostic (ACDx™). As a result of completing this work, operations taking place at the pre-clinical laboratory in Freiburg, Germany would no longer be needed and, accordingly, the lab was closed at the end of January 2019. *LADR Drug Discovery Platform and Centurion* Centurion’s LADR™ (Linker Activated Drug Release) technology platform is a discovery engine combining 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. Centurion has created a “toolbox” of linker technologies that are designed 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. Centurion’s efforts were focused on two classes of ultra-high potency albumin-binding drug conjugates. These drug conjugates combine the proprietary LADR™ linkers with novel derivatives of the auristatin and maytansinoid drug classes. These payloads historically have required a targeting antibody for successful administration to humans. These drug conjugates eliminate the need for a targeting antibody and provide a small molecule therapeutic option with potential broader applicability. Centurion’s novel companion diagnostic, ACDx™ (albumin companion diagnostic), was developed to identify patients with cancer who are most likely to benefit from treatment with the four LADR lead assets. CytRx and Centurion have been working on identifying partnership opportunities for LADR™ ultra-high potency drug conjugates and its albumin companion diagnostic. However, no partnerships or any source of financing has become available after twenty-one months of effort. *Aldoxorubicin* Until July 2017, the Company was focused on the research and clinical development of aldoxorubicin, their modified version of the widely-used chemotherapeutic agent, doxorubicin. Aldoxorubicin combines the chemotherapeutic agent doxorubicin with a novel linker-molecule that binds specifically to albumin in the blood to allow for delivery of higher amounts of doxorubicin (3½ to 4 times) without several of the major dose-limiting toxicities seen with administration of doxorubicin alone. On July 27, 2017, the Company entered into an exclusive worldwide license with ImmunityBio, Inc. (formerly known as NantCell, Inc. (“ImmunityBio”)), granting to ImmunityBio the exclusive rights to develop, manufacture and commercialize aldoxorubicin in all indications, and our company is no longer directly working on development of aldoxorubicin. As part of the license, ImmunityBio made a strategic investment of $13 million in CytRx common stock at $6.60 per share (adjusted to reflect our 2017 reverse stock split), a premium of 92% to the market price on that date. The Company also issued ImmunityBio a warrant to purchase up to 500,000 shares of common stock at $6.60, which expired on January 26, 2019. The Company is entitled to receive up to an aggregate of $343 million in potential milestone payments, contingent upon achievement of certain regulatory approvals and commercial milestones. The Company is also entitled to receive ascending double-digit royalties for net sales for orphan indications such as soft tissue sarcomas and mid to high single digit royalties for other indications. Molecular Chaperone Assets In 2011, CytRx sold the rights to arimoclomol and iroxanadine, based on molecular chaperone regulation technology, to Orphazyme A/S (formerly Orphazyme ApS) in exchange for a one-time, upfront payment and the right to receive up to a total of $120 million (USD) in milestone payments upon the achievement of certain pre-specified regulatory and business milestones, as well as royalty payments based on a specified percentage of any net sales of products derived from arimoclomol. Orphazyme is testing arimoclomol in three additional indications beyond ALS, including Niemann-Pick disease Type C (NPC), Gaucher disease and sporadic Inclusion Body Myositis (sIBM). CytRx received a milestone payment of $250,000 in September 2018. Orphazyme has highlighted positive Phase2/3 clinical trial data in patients with NPC and has announced they remain on track to submit a New Drug Application (NDA) with the U.S. Food and Drug Administration (FDA) and a Marketing Authorization Application (MAA) with the European Medicines Agency (EMA) in the first half of 2020. In such event, CytRx will be entitled to a milestone payment of $4 million upon EMA approval and $6 million upon FDA approval, along with royalties and potential additional milestones. The accompanying condensed consolidated financial statements at September 30, 2019 and for the three-month and nine-month periods ended September 30, 2019 and 2018, 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, 2018 have been derived from our audited financial statements as of that date. The condensed consolidated 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 condensed consolidated 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, 2018.

Description of Company and Basis of Presentation

9 Months Ended

Sep. 30, 2019

Description of Company and Basis of Presentation

1. Description of Company and Basis of Presentation

CytRx Corporation (“CytRx”) is a biopharmaceutical research and development company specializing in oncology and rare diseases. The Company’s focus has been 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. During 2017, CytRx’s discovery laboratory, located in Freiburg, Germany, synthesized and tested over 75 rationally designed drug conjugates with highly potent payloads, culminating in the creation of two distinct classes of compounds. Four lead candidates (LADR-7 through LADR-10) were selected based on in vitro and animal preclinical studies, stability, and manufacturing feasibility. In 2018, additional animal efficacy and toxicology testing of these lead candidates was conducted. In addition, a novel albumin companion diagnostic, ACDx™, was developed to identify patients with cancer who are most likely to benefit from treatment with these drug candidates.

On June 1, 2018, CytRx launched Centurion BioPharma Corporation (“Centurion”), a private wholly owned subsidiary, and transferred all of its assets, liabilities and personnel associated with the laboratory operations in Freiburg, Germany. In connection with said transfer, the Company and Centurion entered into a Management Services Agreement whereby the Company agreed to render advisory, consulting, financial and administrative services to Centurion, for which Centurion shall reimburse the Company for the cost of such services plus a 5% service charge. The Management Services Agreement may be terminated by either party at any time. Centurion is focused on the development of personalized medicine for solid tumor treatment. On December 21, 2018, CytRx announced that Centurion had concluded the pre-clinical phase of development for its four LADR drug candidates, and for its albumin companion diagnostic (ACDx™). As a result of completing this work, operations taking place at the pre-clinical laboratory in Freiburg, Germany would no longer be needed and, accordingly, the lab was closed at the end of January 2019.

LADR Drug Discovery Platform and Centurion

Centurion’s LADR™ (Linker Activated Drug Release) technology platform is a discovery engine combining 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. Centurion has created a “toolbox” of linker technologies that are designed 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.

Centurion’s efforts were focused on two classes of ultra-high potency albumin-binding drug conjugates. These drug conjugates combine the proprietary LADR™ linkers with novel derivatives of the auristatin and maytansinoid drug classes. These payloads historically have required a targeting antibody for successful administration to humans. These drug conjugates eliminate the need for a targeting antibody and provide a small molecule therapeutic option with potential broader applicability.

Centurion’s novel companion diagnostic, ACDx™ (albumin companion diagnostic), was developed to identify patients with cancer who are most likely to benefit from treatment with the four LADR lead assets.

CytRx and Centurion have been working on identifying partnership opportunities for LADR™ ultra-high potency drug conjugates and its albumin companion diagnostic. However, no partnerships or any source of financing has become available after twenty-one months of effort.

Aldoxorubicin

Until July 2017, the Company was focused on the research and clinical development of aldoxorubicin, their modified version of the widely-used chemotherapeutic agent, doxorubicin. Aldoxorubicin combines the chemotherapeutic agent doxorubicin with a novel linker-molecule that binds specifically to albumin in the blood to allow for delivery of higher amounts of doxorubicin (3½ to 4 times) without several of the major dose-limiting toxicities seen with administration of doxorubicin alone.

On July 27, 2017, the Company entered into an exclusive worldwide license with ImmunityBio, Inc. (formerly known as NantCell, Inc. (“ImmunityBio”)), granting to ImmunityBio the exclusive rights to develop, manufacture and commercialize aldoxorubicin in all indications, and our company is no longer directly working on development of aldoxorubicin. As part of the license, ImmunityBio made a strategic investment of $13 million in CytRx common stock at $6.60 per share (adjusted to reflect our 2017 reverse stock split), a premium of 92% to the market price on that date. The Company also issued ImmunityBio a warrant to purchase up to 500,000 shares of common stock at $6.60, which expired on January 26, 2019. The Company is entitled to receive up to an aggregate of $343 million in potential milestone payments, contingent upon achievement of certain regulatory approvals and commercial milestones. The Company is also entitled to receive ascending double-digit royalties for net sales for orphan indications such as soft tissue sarcomas and mid to high single digit royalties for other indications.

Molecular Chaperone Assets

In 2011, CytRx sold the rights to arimoclomol and iroxanadine, based on molecular chaperone regulation technology, to Orphazyme A/S (formerly Orphazyme ApS) in exchange for a one-time, upfront payment and the right to receive up to a total of $120 million (USD) in milestone payments upon the achievement of certain pre-specified regulatory and business milestones, as well as royalty payments based on a specified percentage of any net sales of products derived from arimoclomol. Orphazyme is testing arimoclomol in three additional indications beyond ALS, including Niemann-Pick disease Type C (NPC), Gaucher disease and sporadic Inclusion Body Myositis (sIBM). CytRx received a milestone payment of $250,000 in September 2018. Orphazyme has highlighted positive Phase2/3 clinical trial data in patients with NPC and has announced they remain on track to submit a New Drug Application (NDA) with the U.S. Food and Drug Administration (FDA) and a Marketing Authorization Application (MAA) with the European Medicines Agency (EMA) in the first half of 2020. In such event, CytRx will be entitled to a milestone payment of $4 million upon EMA approval and $6 million upon FDA approval, along with royalties and potential additional milestones.

The accompanying condensed consolidated financial statements at September 30, 2019 and for the three-month and nine-month periods ended September 30, 2019 and 2018, 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, 2018 have been derived from our audited financial statements as of that date.

The condensed consolidated 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 condensed consolidated 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, 2018.