10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-Q

R QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2015

OR

£ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                                                                              to         

Commission file number 0-15327

CytRx Corporation

(Exact name of Registrant as specified in its charter)

Delaware	58-1642740
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

11726 San Vicente Blvd., Suite 650 Los Angeles, CA	90049
(Address of principal executive offices)	(Zip Code)

(310) 826-5648

(Registrant’s telephone number, including area code)

Indicate by check mark whether the Registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  Yes R     No £

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes R  No £

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer £	Accelerated filer R	Non-accelerated filer £	Smaller reporting company £
	(Do not check if a smaller reporting company)

Indicate by check mark whether the Registrant is a shell company (as defined in Rule 12(b)-2 of the Exchange Act).  Yes £     No R

Number of shares of CytRx Corporation common stock, $.001 par value, outstanding as of May 1, 2015: 55,722,711 shares, exclusive of treasury shares.

CYTRX CORPORATION

FORM 10-Q

TABLE OF CONTENTS

		Page
PART I.  — FINANCIAL INFORMATION
Item 1.	Financial Statements (unaudited)	1
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	11
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	15
Item 4.	Controls and Procedures	15
PART II.  — OTHER INFORMATION
Item 1A.	Legal Proceedings	16
Item 6.	Exhibits	16
SIGNATURES		17
INDEX TO EXHIBITS		18

PART I — FINANCIAL INFORMATION

Item 1. — Financial Statements

CYTRX CORPORATION

CONDENSED BALANCE SHEETS

(Unaudited)

	March 31, 2015			December 31, 2014
ASSETS
Current assets:
Cash and cash equivalents	$	28,052,543		$	32,218,905
Short-term investments		37,101,506			45,621,593
Receivables		5,153,127			2,019,293
Interest receivable		76,254			104,627
Prepaid expenses and other current assets		930,277			3,250,355
Total current assets		71,313,707			83,214,773
Equipment and furnishings, net		949,305			970,873
Goodwill		183,780			183,780
Other assets		1,319,505			1,323,156
Total assets	$	73,766,297		$	85,692,582
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:    Accounts payable	$	4,637,623		$	6,655,962
Accrued expenses and other current liabilities		10,354,489			5,994,072
Warrant liability		7,002,379			5,131,085
Total current liabilities		21,994,491			17,781,119
Commitments and contingencies
Stockholders’ equity:
Preferred Stock, $0.01 par value, 5,000,000 shares authorized, including 25,000 shares of Series A Junior Participating Preferred Stock; no shares issued and outstanding		—			—
Common stock, $0.001 par value, 250,000,000 shares authorized;  55,921,986 shares issued and outstanding at March 31, 2015 and December 31, 2014		55,924			55,924
Additional paid-in capital		378,360,877			376,975,984
Treasury stock, at cost (199,275 shares at March 31, 2015 and December 31, 2014)		(2,612,861	)		(2,612,861	)
Accumulated deficit		(324,032,134	)		(306,507,584	)
Total stockholders’ equity		51,771,806			67,911,463
Total liabilities and stockholders’ equity	$	73,766,297		$	85,692,582

The accompanying notes are an integral part of these condensed financial statements.

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CYTRX CORPORATION

CONDENSED STATEMENTS OF OPERATIONS

(Unaudited)

	Three Months Ended March 31,
	2015			2014
Revenue:
License revenue	$	—		$	—
Expenses:
Research and development		12,563,745			6,987,848
General and administrative		3,130,232			3,131,074
		15,693,977			10,118,922
Loss before other income (loss)		(15,693,977	)		(10,118,922	)
Other income (loss):
Interest income		56,574			70,638
Other income (loss), net		(15,853	)		9,898
Gain (loss) on warrant derivative liability		(1,871,294	)		14,702,904
Net income (loss)	$	(17,524,550	)	$	4,664,518
Basic net income (loss) per share	$	(0.31	)	$	0.09
Basic weighted-average shares outstanding		55,722,710			50,314,719
Diluted net income (loss) per share	$	(0.31	)	$	0.08
Diluted weighted-average shares outstanding		55,722,710			55,727,056

The accompanying notes are an integral part of these condensed financial statements

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CYTRX CORPORATION

CONDENSED STATEMENTS OF CASH FLOWS

(Unaudited)

	Three Months Ended March 31,
	2015			2014
Cash flows from operating activities:
Net income (loss)	$	(17,524,550	)	$	4,664,518
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation and amortization		88,490			32,659
Stock-based compensation expense		1,384,893			1,750,222
Fair value adjustment on warrant liability		1,871,294			(14,702,904	)
Net foreign exchange gain (loss)		(47	)		177
Changes in assets and liabilities:
Receivables		(3,133,834	)		85,760
Interest receivable		28,373			(19,311	)
Prepaid expenses and other current assets		2,323,729			621,839
Accounts payable		(2,025,513	)		410,109
Accrued expenses and other current liabilities		4,360,417			244,378
Net cash used in operating activities		(12,626,748	)		(6,912,553	)
Cash flows from investing activities:
Purchase of short-term investments		(15,000,000	)		(23,500,000	)
Proceeds from the sale of short-term investments		23,520,087			—
Purchases of equipment and furnishings		(59,701	)		(6,623	)
Net cash provided by (used in) investing activities		8,460,386			(23,506,623	)
Cash flows from financing activities:    Net proceeds from public offering		—			80,535,401
Proceeds from issuance of restricted stock to employee		—			100
Net proceeds from exercise of warrants and stock options		—			428,891
Net cash provided by financing activities		—			80,964,392
Net increase (decrease) in cash and cash equivalents		(4,166,362	)		50,545,216
Cash and cash equivalents at beginning of period		32,218,905			11,483,112
Cash and cash equivalents at end of period	$	28,052,543		$	62,028,328
Supplemental disclosure of cash flow information:
Equipment and furnishings purchased on credit	$	7,221		$	7,542
Cashless warrant exercises	$	—		$	133
Cash paid for income taxes	$	800		$	3,151

The accompanying notes are an integral part of these condensed financial statements.

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NOTES TO CONDENSED FINANCIAL STATEMENTS

March 31, 2015

(Unaudited)

1.  Description of Company and Basis of Presentation

CytRx Corporation (“CytRx” or the “Company”) is a biopharmaceutical research and development company specializing in oncology.  The Company currently is focused on the clinical development of aldoxorubicin (formerly known as INNO-206), its modified version of the widely-used chemotherapeutic agent, doxorubicin.  CytRx has initiated under a Special Protocol Assessment, or “SPA,” granted by the U.S. Food and Drug Administration, or the “FDA,” a pivotal Phase 3 global trial with aldoxorubicin as a therapy for patients with soft tissue sarcomas whose tumors have progressed following treatment with chemotherapy, and has announced that it has received approval from the FDA to continue dosing patients with aldoxorubicin until disease progression in that clinical trial.  CytRx is currently evaluating aldoxorubicin in a global Phase 2b clinical trial in small cell lung cancer, a Phase 2 clinical trial in HIV-related Kaposi's sarcoma, a Phase 2 clinical trial in patients with late-stage glioblastoma (brain cancer), a Phase 1b trial in combination with ifosfamide in patients with soft tissue sarcoma, and a Phase 1b trial in combination with gemcitabine in subjects with metastatic solid tumors.  CytRx has completed a global Phase 2b clinical trial with aldoxorubicin as a first-line therapy for soft tissue sarcomas, a Phase 1b/2 clinical trial primarily in the same indication, a Phase 1b clinical trial of aldoxorubicin in combination with doxorubicin in patients with advanced solid tumors and a Phase 1b pharmacokinetics clinical trial in patients with metastatic solid tumors.  CytRx plans to expand its pipeline of oncology candidates at its laboratory facilities in Freiburg, Germany, based on novel linker technologies that can be utilized with multiple chemotherapeutic agents and may allow for greater concentration of drug at tumor sites.

The accompanying condensed financial statements at March 31, 2015 and for the three-month periods ended March 31, 2015 and 2014, 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, 2014 have been derived from the Company’s audited financial statements as of that date.

The financial statements included herein have been prepared by the Company 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, 2014. The Company’s operating results will fluctuate for the foreseeable future. Therefore, period-to-period comparisons should not be relied upon as predictive of the results in future periods.

2.           Foreign Currency Remeasurement

The U.S. dollar has been determined to be the functional currency for the net assets of the CytRx German Branch. The transactions are recorded in the local currencies and are remeasured at each reporting date using the historical rates for nonmonetary assets and liabilities and current exchange rates for monetary assets and liabilities at the balance sheet date. Exchange gains and losses from the remeasurement of monetary assets and liabilities are recognized in other income (loss). The Company recognized a loss of approximately $16,528 for the three-month period ended March 31, 2015, and zero for the comparative period in 2014.

3.           Recent Accounting Pronouncements

We have reviewed all of the recent accounting pronouncements and have determined that they have not or will not have a material impact on the Company’s financial statements, or simply do not apply to the Company’s operations.

4.           Short-term Investments

The Company held $37.1 million of short-term investments at March 31, 2015, as compared to $45.6 million at December 31, 2014.  The Company has classified these investments as available for sale.  These investments are federally insured certificates of deposit in the following amounts and maturities: $15.0 million with a maturity date of August 27, 2015; $12.1 million with a maturity date of April 30, 2015; and $10.0 million with a maturity date of April 23, 2015.

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5.           Basic and Diluted Net Income (Loss) Per Common Share

Basic and diluted net loss per common share is computed based on the weighted-average number of common shares outstanding. Common share equivalents (which consist of options, warrants and restricted stock) are excluded from the computation of diluted net income (loss) per common share where the effect would be anti-dilutive.  Common share equivalents that could potentially dilute net income (loss) per share in the future, and which were excluded from the computation of diluted loss per share, totaled 17.5 million shares for the three-month period ended March 31, 2015, and 9.2 million shares for the three-month period ended March 31, 2014.

6.           Warrant Liabilities

Liabilities measured at market value on a recurring basis include warrant liabilities resulting from the Company’s past equity financings.  In accordance with ASC 815-40, Derivatives and Hedging – Contracts in Entity’s Own Equity (“ASC 815-40”), the warrant liabilities are being marked to market until they are completely settled.  The warrants are valued using the Black-Scholes method, using assumptions consistent with the Company’s application of ASC 505-50, Equity-Based Payments to Non-Employees (“ASC 505-50”).  The gain or loss resulting from the marked to market calculation is shown on the Condensed Statements of Operations as gain (loss) on warrant derivative liability. The Company recognized a loss of $1.9 million and a gain of $14.7 million for the three-month periods ended March 31, 2015 and 2014, respectively. The following reflects the weighted-average assumptions for each of the three-month periods indicated:

	Three Months Ended March 31,
	2015			2014
Risk-free interest rate		0.41	%		0.63	%
Expected dividend yield		0	%		0	%
Expected lives		1.34			2.21
Expected volatility		92.4	%		85.7	%
Warrants classified as liabilities (in shares)		6,371,854			6,984,716
Gain (loss) on warrant liability	$	(1,871,294	)	$	14,702,904

The Company’s computation of expected volatility is based on the historical daily volatility of its publicly traded stock. The dividend yield assumption of zero is based upon the fact that the Company has never paid cash dividends and presently has no intention to do so.  The risk-free interest rate used for each warrant classified as a derivative is equal to the U.S. Treasury rates in effect at March 31 of each year presented. The expected lives are based on the remaining contractual lives of the related warrants at the valuation date.

7.           Stock Based Compensation

The Company has a 2000 Long-Term Incentive Plan, which expired on August 6, 2010.  As of March 31, 2015, there were approximately 0.7 million shares subject to outstanding stock options under this plan.  No further shares are available for future grant under this plan.

The Company also has a 2008 Stock Incentive Plan.  As of March 31, 2015, there were 9.5 million shares subject to outstanding stock options and 0.5 million shares available for future grant under this plan.

The Company follows ASC 718, Compensation-Stock Compensation, which requires the measurement and recognition of compensation expense for all stock-based awards made to employees.

For stock options and stock warrants paid in consideration of services rendered by non-employees, the Company recognizes compensation expense in accordance with the requirements of ASC 505-50.

Non-employee option grants that do not vest immediately upon grant are recorded as an expense over the vesting period. At the end of each financial reporting period, the value of these options, as calculated using the Black-Scholes option-pricing model, is determined, and compensation expense recognized or recovered during the period is adjusted accordingly. Since the fair market value of options granted to non-employees is subject to change in the future, the amount of the future compensation expense is subject to adjustment until the common stock options are fully vested.

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The following table sets forth the total stock-based compensation expense resulting from stock options and warrants included in the Company’s unaudited interim statements of operations:

	Three Months Ended March 31,
	2015		2014
Research and development — employee	$	335,938	$	175,153
General and administrative — employee		955,404		311,960
Total employee stock-based compensation	$	1,291,342	$	487,113
Research and development — non-employee	$	—	$	86,539
General and administrative — non-employee		93,551		191,992
Total non-employee stock-based compensation	$	93,551	$	278,531

During the three-month period ended March 31, 2015, the Company granted stock options to purchase 180,000 shares of its common stock, and during the corresponding 2014 period, the Company granted stock options to purchase 270,000 shares of its common stock and warrants to purchase 25,000 shares of its common stock at an exercise price of $5.60. The fair value of the stock options and warrants was estimated using the Black-Scholes option-pricing model, based on the following assumptions:

	Three months Ended March 31, 2015			Three Months Ended March 31, 2014
Risk-free interest rate		2.20	%		1.98	%
Expected volatility		84.3	%		87.8% - 89.6	%
Expected lives (years)		10			6 - 10
Expected dividend yield		0.00	%		0.00	%

The Company’s computation of expected volatility is based on the historical daily volatility of its publicly traded stock.  The Company uses historical information to compute expected lives. In the three-month period ended March 31, 2015, the contractual term and the expected life of the options granted was ten years. The dividend yield assumption of zero is based upon the fact the Company has never paid cash dividends and presently has no intention to do so.  The risk-free interest rate used for each grant and issuance is equal to the U.S. Treasury rates in effect at the time of the grant and issuance for instruments with a similar expected life. Based on historical experience, for the three-month period ended March 31, 2015, the Company has estimated an annualized forfeiture rate of 10% for options granted to its employees, 2% for options granted to senior management and 0% for options granted to directors and non-employees and warrants issued to non-employees.  For the comparative three-month period ended March 31, 2014, the Company has estimated an annualized forfeiture rate of 12% for options granted to its employees, 2% for options granted to senior management and 0% for options granted to directors and non-employees.  Compensation costs will be adjusted for future changes in estimated forfeitures.  The Company will record additional expense if the actual forfeitures are lower than estimated and will record a recovery of prior expense if the actual forfeiture rates are higher than estimated.  No amounts relating to stock-based compensation have been capitalized.

As of March 31, 2015, there remained approximately $5.6 million of unrecognized compensation expense related to unvested stock options granted to current and former employees and directors, which expect will be recognized over a weighted-average period of 1.14 years. Presented below is the Company’s stock option activity:

	Three months Ended March 31, 2015
	Number of Options (Employees)		Number of Options (Non-Employees)			Total Number of Options			Weighted-Average Exercise Price
Outstanding at January 1, 2015		9,348,592		692,143			10,040,735		$	2.87
Granted		180,000		—			180,000		$	3.15
Exercised, forfeited or expired		—		(56,429	)		(56,429	)	$	8.54
Outstanding at March 31, 2015		9,528,592		635,714			10,164,306		$	2.84
Options exercisable at March 31, 2015		5,528,887		635,714			6,164,601		$	3.14

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The following table summarizes significant ranges of outstanding stock options under the Company’s plans at March 31, 2015:

Range of Exercise Prices		Number of Options		Weighted-Average Remaining Contractual Life (years)		Weighted-Average Exercise Price		Number of Options Exercisable		Weighted-Average Remaining Contractual Life (years)		Weighted-Average Exercise Price
$	1.83 - $2.50		7,932,556		8.74	$	2.19		4,212,622		8.33	$	2.17
$	2.51 – $3.50		954,482		8.89	$	2.85		873,054		8.87	$	2.83
$	3.51 – $8.00		989,201		5.79	$	6.27		790,858		5.01	$	6.50
$	8.01 – $32.55		288,067		2.56	$	9.00		288,067		2.56	$	9.00
			10,164,306		8.29	$	2.84		6,164,601		7.71	$	3.14

The aggregate intrinsic value of outstanding options and options vested as of March 31, 2015 were $9.8 million and $5.5 million respectively, which represents the exercise price of the options below the fair market value of the Company’s common stock on March 31, 2015 of $3.37 per share.

There were 7,292,617 and 7,349,760 warrants outstanding at March 31, 2015 and December 31, 2014, respectively at a weighted-average price of $4.29 and $4.27, respectively.

Restricted Stock

On January 1, 2014, the Company granted to Dr. Daniel Levitt, Executive Vice President and Chief Medical Officer, 100,000 CytRx Corporation restricted shares of common stock of the Company pursuant to the 2008 Plan, which shares have now fully vested.  The fair value of the restricted stock is based on the market price of the Company’s common stock on the grant date less the par value received as consideration. The fair value of the restricted shares granted on January 1, 2014 was $627,000. The stock-based compensation expense relating to restricted stock included in the company’s unaudited statements of operations for the three-month period ended March 31, 2014 was $154,578.  No restricted shares of common stock of the Company were granted in the first period of 2015.

8.           Fair Value Measurements

Assets and liabilities recorded at fair value on the balance sheets are categorized based upon the level of judgment associated with the inputs used to measure the fair value.  Level inputs are as follows:

Level 1 – quoted prices in active markets for identical assets or liabilities.

Level 2 – other significant observable inputs for the assets or liabilities through corroboration with market data at the measurement date.

Level 3 – significant unobservable inputs that reflect management’s best estimate of what market participants would use to price the assets or liabilities at the measurement date.

The following table summarizes fair value measurements by level at March 31, 2015 for assets and liabilities measured at fair value on a recurring basis:

(In thousands)	Level I		Level II		Level III			Total
Cash equivalents	$	27,429	$	—	$	—		$	27,429
Short-term investments		37,102		—		—			37,102
Warrant liability		—		—		(7,002	)		(7,002	)

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The following table summarizes fair value measurements by level at December 31, 2014 for assets and liabilities measured at fair value on a recurring basis:

(In thousands)	Level I		Level II		Level III			Total
Cash equivalents	$	31,159	$	—	$	—		$	31,159
Short-term investments		45,622		—		—			45,622
Warrant liability		—		—		(5,131	)		(5,131	)

Liabilities measured at market value on a recurring basis include warrant liability resulting from the Company’s August 2011 equity financing. In accordance with ASC 815-40, the warrant liability are marked to market each quarter-end until they are completely settled. The warrants are valued using the Black-Scholes method, using assumptions consistent with the Company’s application of ASC 505-50. The change in the fair value of the liabilities classified in Level III is due to the unrealized loss of $1.9 million recognized and the gain is presented in the Condensed Statement of Operations (see Note 6).

The Company considers carrying amounts of accounts receivable, accounts payable and accrued expenses to approximate fair value due to the short-term nature of these financial instruments.  

The Company’s non-financial assets are measured at fair value when there is an indicator of impairment and recorded at fair value only when an impairment charge is recognized.  The Company’s non-financial assets were not material at March 31, 2015 or 2014.

9.           Liquidity and Capital Resources

At March 31, 2015, the Company had cash and cash equivalents of approximately $28.1 million and short-term investments of approximately $37.1 million.  Management believes that the Company’s current cash and cash equivalents and short-term investments will be sufficient to fund its operations for the foreseeable future.  The estimate is based, in part, upon the Company’s currently projected expenditures for the remainder of 2015 and the first three months of 2016 of approximately $56.3 million, whichincludes approximately $41.7 million for its clinical programs for aldoxorubicin, approximately $2.0 million for pre-clinical development of new albumin-binding cancer drug candidates, approximately $3.7 million for general operation of its clinical programs, and approximately $8.9 million for other general and administrative expenses. These projected expenditures are also based upon numerous other assumptions and subject to many uncertainties, and the Company’s actual expenditures may be significantly different from these projections.

If the Company obtains marketing approval and successfully commercializes aldoxorubicin or other product candidates, the Company anticipates it could take severalyears for it to generate significant recurring revenue.  The Company will be dependent on future financing and possible strategic partnerships until such time, if ever, as it can generate significant recurring revenue. The Company has no commitments from third parties to provide any additional financing, and it may not be able to obtain future financing on favorable terms, or at all. If the Company fails to obtain sufficient funding when needed, it may be forced to delay, scale back or eliminate all or a portion of its development programs or clinical trials, seek to license to other companies its product candidates or technologies that it would prefer to develop and commercialize itself, or seek to sell some or all of its assets or merge with or be acquired by another company.

10.           Equity Transactions

On January 1, 2014, the Company granted 100,000 shares of restricted stock to Dr. Daniel Levitt, Executive Vice President and Chief Medical Officer (see Note 7), which resulted in non-cash expense of $0.6 million.

On February 5, 2014, the Company completed an $86.0 million underwritten public offering, in which it sold and issued 13.2 million shares of common stock at a price of $6.50 per share. Net of underwriting discounts, legal, accounting and other offering expenses, the Company received proceeds of approximately $80.5 million.

On March 15, 2014, the Company issued 200,000 common shares and warrants to purchase 25,000 common shares to KTB Tumorforschungs GmbH, or “KTB,” the licensor of aldoxorubicin, in connection with the establishment of the Company’s Freiburg, Germany research and development laboratory. The fair value of the newly-issued shares was $0.8 million.

In the first quarter of 2014, the Company issued approximately 278,000 common shares for $0.4 million resulting from the exercise of warrants.

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11.           Income Taxes

At December 31, 2014, the Company had federal and state net operating loss carryforwards as of  $227.5 million and $157.5 million, respectively, available to offset against future taxable income, which expire in 2015 through 2034, of which $165.2 million and $157.5 million, respectively, are not subject to limitation under Section 382 of the Internal Revenue Code.

12.           Commitments and contingencies

Commitments

The Company has an agreement with KTB for the exclusive license of patent rights held by KTB for the worldwide development and commercialization of aldoxorubicin. Under the agreement, the Company must make payments to KTB in the aggregate of $7.5 million upon meeting clinical and regulatory milestones up to and including the product’s second final marketing approval. In the three months ended March 31, 2014, the Company met two clinical milestones, resulting in total payments of $2.0 million to KTB.  The Company also has agreed to pay:

·   commercially reasonable royalties based on a percentage of net sales (as defined in the agreement);  

·   a percentage of non-royalty sub-licensing income (as defined in the agreement); and  

·   milestones of $1 million for each additional final marketing approval that the Company obtains.  

·   In the event that the Company must pay a third party in order to exercise its rights to the intellectual property under the agreement, the Company will deduct a percentage of those payments from the royalties due KTB, up to an agreed upon cap.

Contingencies

As previously reported, on June 13, 2014, three purported securities class action lawsuits pending in the United States District Court for the Central District of California, were consolidated in the matter of In re CytRx Corporation Securities Litigation, 2:14-CV-01956-GHK (PJWx), and lead plaintiff and lead counsel were appointed. On October 1, 2014, plaintiffs filed a consolidated amended complaint on behalf of all persons who purchased or otherwise acquired the publicly traded securities of CytRx between November 20, 2013 and March 13, 2014, against CytRx, certain Company officers and directors, a freelance writer, and certain underwriters. The complaint alleges that certain of the defendants violated the Securities Exchange Act of 1934 by making materially false and misleading statements in press releases, promotional articles, SEC filings and other public statements. The complaint further alleges that certain of the defendants violated the Securities Act of 1933 by making materially misleading statements and omitting material information in the shelf Registration Statement on Form S-3 filed with the SEC on December 6, 2012 and Prospectus Supplement on Form 424(b)(2) filed with the SEC on January 31, 2014. These allegations arise out of the Company’s alleged retention of The DreamTeam Group and MissionIR, external investor and public relations firms unaffiliated with the Company, as well as the Company’s December 9, 2013 grant of stock options to certain board members and officers. The consolidated amended complaint seeks damages, including interest, in an unspecified amount, reasonable costs and attorneys’ fees, and any equitable, injunctive, or other relief that the court may deem just and proper.  On December 5, 2014, CytRx and the individual defendants filed a motion to dismiss the complaint.  The Court was scheduled to hear argument on this motion on March 2, 2015.  On February 25, 2015, the Court took this motion under submission and took the hearing off calendar.

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Also, on April 3, 2014, as previously reported, a purported class action lawsuit was filed against the Company and certain officers and each director, as well as certainunderwriters, in the Superior Court of California, County of Los Angeles, captioned Rajasekaran v. CytRx Corporation, et al., BC541426. The complaint purports to be brought on behalf of all shareholders who purchased or otherwise acquired the Company’s common stock pursuant and/or traceable to the Company’s secondary common stock offering, which closed on February 5, 2014. The complaint alleges that defendants violated the federal securities laws by making materially false and misleading statements in filings with the SEC. The complaint seeks compensatory damages in an unspecified amount, rescission, and attorney’s fees and costs.  On October 14, 2014, the court granted the parties’ joint ex parte motion to stay this proceeding pending resolution of motions to dismiss in the related federal action, In re CytRx Corporation Securities Litigation, 2:14-CV-01956-GHK (PJWx).

As previously reported, on July 3, 2014, a shareholder derivative lawsuit was filed in the United States District Court for the Central District of California, captioned Fishman v. Kriegsman, et al., 2:14-cv-05169, against nominal defendant CytRx and certain officers and each director of the Company. The complaint alleges breach of fiduciary duties, corporate waste, gross mismanagement, and unjust enrichment in connection with the Company's alleged retention of DreamTeamGroup and MissionIR, two external investor and public relations firms unaffiliated with the Company.  The complaint seeks damages, restitution, corporate governance reforms, and attorney’s fees and costs.  On September 3, 2014, plaintiff filed a notice to voluntarily dismiss this action against all parties without prejudice, which the court granted on September 9, 2014. On June 13, 2014, the Delaware Court of Chancery consolidated Schwartz v. Ignarro, et al., Case No. 9864, Johnson v. Ignarro, et al., Case No. 9884, and Silverberg v. Kriegsman, et al., Case No. 9919, three shareholder derivative lawsuits described in our Quarterly Report filed with the SEC on August 6, 2014.  The allegations in the Schwartz and Johnson complaints relate to the Company’s December 9, 2013 grant of stock options to certain board members and officers.  The allegations in the Silverberg complaint relate to the Company’s December 9, 2013 grant of stock options to certain board members and officers as well as the Company’s alleged retention of DreamTeamGroup and MissionIR, two external investor and public relations firms unaffiliated with the Company.  A consolidated complaint was filed on October 9, 2014.On November 10, 2014, CytRx and the individual defendants filed a motion to dismiss the complaint or, in the alternative, to stay the action. The Delaware Court of Chancery heard argument on the motions on January 8, 2015. The Court denied the motion to dismiss and granted in part and denied in part the motion to stay. On August 14, 2014, a shareholder derivative lawsuit, captioned Pankratz v. Kriegsman, et al., 2:14-cv-06414-PA-JPR, was filed in the United States District Court for the Central District of California against CytRx, as nominal defendant, and certain officers and each director.  The complaint alleges breach of fiduciary duties, unjust enrichment, gross mismanagement, abuse of control, insider selling and misappropriation of information in connection with the Company's alleged retention of DreamTeamGroup and MissionIR, two external investor and public relations firms unaffiliated with the Company, as well as the Company’s December 9, 2013 grant of stock options to certain board members and officers.  The complaint seeks unspecified damages, corporate governance and internal procedures reforms, restitution, disgorgement of all profits, benefits, and other compensation obtained by the individual defendants, and the costs and disbursements of the action.  On August 15, 2014, a shareholder derivative complaint, captioned Taylor v. Kriegsman, et al., 2:14-cv-06451, was filed in the United States District Court for the Central District of California against CytRx, as nominal defendant, and certain officers and each director. The complaint alleges breach of fiduciary duties, unjust enrichment, gross mismanagement, abuse of control, unjust enrichment, insider selling and misappropriation of information in connection with the Company's alleged retention of DreamTeamGroup and MissionIR, two external investor and public relations firms unaffiliated with the Company, as well as the Company’s December 9, 2013 grant of stock options to certain board members and officers. The complaint seeks unspecified damages, corporate governance and internal procedures reforms, restitution, disgorgement of all profits, benefits, and other compensation obtained by the individual defendants, and the costs and disbursements of the action.  On October 8, 2014, the court in Pankratz and Taylor consolidated the cases and appointed lead plaintiffs and co-lead counsel. On October 20, 2014, the Company and the individual defendants filed motions to dismiss the consolidated Pankratz and Taylor cases or, in the alternative, to stay the cases. On January 9, 2015, the Court stayed the action pending the resolution of the consolidated Delaware derivative action. On February 27, 2015, the Pankratz and Taylor plaintiffs filed a motion to vacate the stay. The Court took the matter under advisement and has not yet ruled on the motion.

We intend to vigorously defend against the foregoing complaints. The Company has directors’ and officers’ liability insurance, which will be utilized in the defense of these matters. As of March 31, 2015, the Company has submitted $8.6 million of expenses to its insurance carrier for reimbursement, of which $5.1 million remains in the Receivables on the accompanying Condensed Balance Sheet. The Company expects to recover this amount from its insurance carrier. The liability insurance may not cover all of the future liabilities the Company may incur in connection with the foregoing matters. We record accruals for loss contingencies to the extent that we conclude that it is probable that a liability has been incurred and the amount of the related loss can be reasonably estimated. Based on the very early stage of litigation, it is not possible to estimate the amount or range of possible loss that might result from an adverse judgment or a settlement of these matters. We evaluate developments in legal proceedings and other matters on a quarterly basis.

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Item 2. — Management’s Discussion and Analysis of Financial Condition and Results of Operations

Forward Looking Statements

From time to time, we make oral and written statements that may constitute “forward-looking statements” (rather than historical facts) as defined in the Private Securities Litigation Reform Act of 1995 or by the SEC in its rules, regulations and releases, including Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. We desire to take advantage of the “safe harbor” provisions in the Private Securities Litigation Reform Act of 1995 for forward-looking statements made from time to time, including, but not limited to, the forward-looking statements made in this Quarterly Report, as well as those made in our other filings with the SEC.

All statements in this Quarterly Report, including statements in this section, other than statements of historical fact are forward-looking statements for purposes of these provisions, including statements of our current views with respect to the recent developments regarding our business strategy, business plan and research and development activities, our future financial results, and other future events. These statements include forward-looking statements both with respect to us, specifically, and the biotechnology industry, in general. In some cases, forward-looking statements can be identified by the use of terminology such as “may,” “will,” “expects,” “plans,” “anticipates,” “estimates,” “potential” or “could” or the negative thereof or other comparable terminology. Although we believe that the expectations reflected in the forward-looking statements contained herein are reasonable, there can be no assurance that such expectations or any of the forward-looking statements will prove to be correct, and actual results could differ materially from those projected or assumed in the forward-looking statements.

All forward-looking statements involve inherent risks and uncertainties, and there are or will be important factors that could cause actual results to differ materially from those indicated in these statements. We believe that these factors include, but are not limited to, the factors discussed in this section and under the caption “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2014, which should be reviewed carefully. If one or more of these or other risks or uncertainties materialize, or if our underlying assumptions prove to be incorrect, actual results may vary materially from what we anticipate. Please consider our forward-looking statements in light of those risks as you read this Quarterly Report. We undertake no obligation to publicly update or review any forward-looking statement, whether as a result of new information, future developments or otherwise.

Overview

CytRx Corporation (“CytRx” or the “Company”) is a biopharmaceutical research and development company specializing in oncology. We currently are focused on the clinical development of aldoxorubicin, our modified version of the widely-used chemotherapeutic agent, doxorubicin. We have initiated under an SPA a pivotal Phase 3 global trial with aldoxorubicin as a therapy for patients with soft tissue sarcomas whose tumors have progressed following treatment with chemotherapy, and have received approval from the FDA to continue dosing patients with aldoxorubicin until disease progression in that clinical trial.  We are currently evaluating aldoxorubicin in a global Phase 2b clinical trial in small cell lung cancer, a Phase 2 clinical trial in HIV-related Kaposi's sarcoma, a Phase 2 clinical trial in patients with late-stage glioblastoma (brain cancer), a Phase 1b trial in combination with ifosfamide in patients with soft tissue sarcoma, and a Phase 1b trial in combination with gemcitabine in subjects with metastatic solid tumors.  We have completed a global Phase 2b clinical trial with aldoxorubicin as a first-line therapy for soft tissue sarcomas, a Phase 1b/2 clinical trial primarily in the same indication, a Phase 1b clinical trial of aldoxorubicin in combination with doxorubicin in patients with advanced solid tumors and a Phase 1b pharmacokinetics clinical trial in patients with metastatic solid tumors.  We plan to expand our pipeline of oncology candidates at our new laboratory facilities in Freiburg, Germany, based on novel linker technologies that can be utilized with multiple chemotherapeutic agents and may allow for greater concentration of drug at tumor sites.

Critical Accounting Policies and Estimates

Management’s discussion and analysis of our financial condition and results of operations are based on our financial statements, which have been prepared in accordance with accounting principles generally accepted in the U.S. The preparation of these financial statements requires management to make estimates and judgments that affect the reported amounts of assets, liabilities, revenue and expenses, and related disclosure of contingent assets and liabilities. On an ongoing basis, management evaluates its estimates, including those related to revenue recognition, impairment of long-lived assets, including finite-lived intangible assets, research and development expenses and clinical trial expenses and stock-based compensation expense.

We base our estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ materially from these estimates under different assumptions or conditions.

Our significant accounting policies are summarized in Note 2 to our financial statements contained in our Annual Report on Form 10-K for the year ended December 31, 2014. We believe the following critical accounting policies affect our more significant judgments and estimates used in the preparation of our financial statements.

Revenue Recognition

Revenue consists of license fees from strategic alliances with pharmaceutical companies, as well as service and grant revenues. Service revenueconsists of contract research and laboratory consulting. Grant revenuesconsist of government and private grants.

Monies received for license fees are deferred and recognized ratably over the performance period in accordance with Financial Accounting Standards Board (“FASB”) Accounting Codification Standards (“ASC”) ASC 605-25, Revenue Recognition – Multiple-Element Arrangements (“ASC 605-25”). Milestone payments will be recognized upon achievement of the milestone as long as the milestone is deemed substantive and we have no other performance obligations related to the milestone and collectability is reasonably assured, which is generally upon receipt, or recognized upon termination of the agreement and all related obligations. Deferred revenue represents amounts received prior to revenue recognition.

Revenues from contract research, government grants, and consulting fees are recognized over the respective contract periods as the services are performed, provided there is persuasive evidence or an arrangement, the fee is fixed or determinable and collection of the related receivable is reasonably assured. Once all conditions of the grant are met and no contingencies remain outstanding, the revenue is recognized as grant fee revenue and an earned but unbilled revenue receivable is recorded.

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Research and Development Expenses

Research and development expenses consist of direct and overhead-related research expenses and are expensed as incurred. Costs to acquire technologies, including licenses, that are utilized in research and development and that have no alternative future use are expensed when incurred. Costs of technology developed for use in our products are expensed as incurred until technological feasibility has been established.

Clinical Trial Expenses

Clinical trial expenses, which are included in research and development expenses, include obligations resulting from our contracts with various clinical research organizations in connection with conducting clinical trials for our product candidates. We recognize expenses for these activities based on a variety of factors, including actual and estimated labor hours, clinical site initiation activities, patient enrollment rates, estimates of external costs and other activity-based factors. We believe that this method best approximates the efforts expended on a clinical trial with the expenses we record. We adjust our rate of clinical expense recognition if actual results differ from our estimates. If our estimates prove incorrect, clinical trial expenses recorded in future periods could vary.

Stock-Based Compensation

Our stock-based employee compensation plans are described in Note 7 of the Notes to Condensed Financial Statements included in this Quarterly Report. We follow ASC 718, Compensation-Stock Compensation (“ASC 718”), which requires the measurement and recognition of compensation expense for all stock-based awards made to employees.

For stock options and warrants paid in consideration of services rendered by non-employees, we recognize compensation expense in accordance with the requirements of ASC 505-50, Equity-Based Payments to Non-Employees (“ASC 505-50”).

Non-employee option grants that do not vest immediately upon grant are recorded as an expense over the vesting period. At the end of each financial reporting period prior to performance, the value of these options is determined using the Black-Scholes option-pricing model, and compensation expense recognized or recovered during the period is adjusted accordingly. Since the fair market value of options granted or issued to non-employees is subject to change in the future, the amount of the future compensation expense is subject to adjustment until the common stock options or warrants are fully vested.

The fair value of each stock option and warrant is estimated using the Black-Scholes option-pricing model, which uses certain assumptions related to risk-free interest rates, expected volatility, expected life of the stock options and future dividends. Compensation expense is recorded based upon the value derived from the Black-Scholes option-pricing model, based on an expected forfeiture rate that is adjusted for our actual experience. If our Black-Scholes option-pricing model assumptions or our actual or estimated forfeiture rate are different in the future, it could materially affect our compensation expense recorded in future periods.

Impairment of Long-Lived Assets

We review long-lived assets, including finite-lived intangible assets, for impairment on an annual basis as of December 31, or on an interim basis if an event occurs that might reduce the fair value of such assets below their carrying values. An impairment loss would be recognized based on the difference between the carrying value of the asset and its estimated fair value, which would be determined based on either discounted future cash flows or other appropriate fair value methods. If our estimates used in the determination of either discounted future cash flows or other appropriate fair value methods are not accurate as compared to actual future results, we may be required to record an impairment charge.

Net Income (Loss) per Share

Basic and diluted net loss per common share is computed using the weighted-average number of common shares outstanding. Potentially dilutive stock options and warrants to purchase 17.5 million  shares for the three-month period ended March 31, 2015, and 9.2 million shares for the three-month period ended March 31, 2014, were excluded from the computation of diluted net loss per share, because the effect would be anti-dilutive.

Warrant Liabilities

Liabilities measured at market value on a recurring basis include warrant liabilities resulting from our August 2011 equity financing. In accordance with ASC 815-40, Accounting for Derivative Financial Instruments Indexed to and Potentially Settled in a Company’s Own Stock (“ASC 815-40”), the warrant liabilities are marked to market each quarter-end until they are completely settled. The warrants are valued using the Black-Scholes method, using assumptions consistent with our application of ASC 505-50. The gain or loss resulting from the marked to market calculation is shown on the statements of operations as a gain or loss on warrant derivative liabilities.

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Liquidity and Capital Resources

We have relied primarily upon proceeds from sales of our equity securities and the exercise of options and warrants, and to a much lesser extent upon payments from our strategic partners and licensees, to generate funds needed to finance our business and operations.

At March 31, 2015, we had cash and cash equivalents of approximately $28.1 million and short-term investments of approximately $37.1 million.  Management believes that our current cash on hand and short-term investments will be sufficient to fund our operations for the foreseeable future.  The estimate is based, in part, upon our currently projected expenditures for the remainder of 2015 and the first three months of 2016 of approximately $56.3 million, whichincludes approximately $41.7 million for our clinical programs for aldoxorubicin, approximately $2.0 million for pre-clinical development of new albumin-binding cancer drugs, approximately $3.7 million for general operation of our clinical programs, and approximately $8.9 million for other general and administrative expenses. These projected expenditures are also based upon numerous other assumptions and subject to many uncertainties, and our actual expenditures may be significantly different from these projections.

If we obtain marketing approval and successfully commercialize aldoxorubicin or other product candidates, we anticipate it will take severalyears for us to generate significant recurring revenue. We will be dependent on future financing and possible strategic partnerships until such time, if ever, as we can generate significant recurring revenue. We have no commitments from third parties to provide us with any additional financing, and we may not be able to obtain future financing on favorable terms, or at all.  If we fail to obtain sufficient funding when needed, we may be forced to delay, scale back or eliminate all or a portion of our development programs or clinical trials, seek to license to other companies our product candidates or technologies that we would prefer to develop and commercialize ourselves, or seek to sell some or all of our assets or merge with or be acquired by another company.

We recorded a net loss in the three-month period ended March 31, 2015 of $17.5 million as compared to net income in the comparative 2014 period of $4.7 million, or an increase of $22.2 million, due principally to the recording of a loss for the current three-month period of $1.9 million for the change in the fair value of warrant liabilities as compared to a gain in the three-month period ended March 31, 2014 of $14.7 million, for a difference of $16.6 million. We also experienced an increase in our research and development expenditures on a comparative basis of $5.6 million, resulting from increased expenditures associated with our clinical programs for aldoxorubicin.

We purchased $15.0 million and sold $23.5 million of short-term investments, for a net increase in cash and cash equivalents of $8.5 million in the three-month period ended March 31, 2015, as compared to the purchase of short-term investments of $23.5 million in the comparative 2014 period. We do not expect any significant capital spending during the next 12 months.

We did not conduct any public offering in the three-month period ended March 31, 2015, and we raised net proceeds of $80.5 million from a public offering in the three-month period ended March 31, 2014. We did not receive any proceeds from the exercise of options and warrants in the three-month period ended March 31, 2015, as compared to $0.4 million received in the comparative 2014 period.

We continue to evaluate potential future sources of capital, as we do not currently have commitments from any third parties to provide us with additional capital. The results of our technology licensing efforts and the actual proceeds of any fund-raising activities will determine our ongoing ability to operate as a going concern. Our ability to obtain future financings through joint ventures, product licensing arrangements, royalty sales, equity financings, grants or otherwise is subject to market conditions and our ability to identify parties that are willing and able to enter into such arrangements on terms that are satisfactory to us. Depending upon the outcome of our fundraising efforts, the accompanying financial information may not necessarily be indicative of our future financial condition.

As a development company that is primarily engaged in research and development activities, we expect to incur significant losses and negative cash flow from operating activities for the foreseeable future.  There can be no assurance that we will be able to generate revenues from our product candidates and become profitable.  Even if we become profitable, we may not be able to sustain that profitability.

Results of Operations

We recorded a net loss of approximately $17.5 million for the three-month period ended March 31, 2015, as compared to net income in the three-month period ended March 31, 2014 of $4.7 million. In the current three-month period, we recorded a loss on warrant derivative liability of $1.9 million, as compared to a gain on warrant liability of $14.7 million in the comparative 2014 period, for a difference of $16.6 million. Our research and development expenditures of  increased  from $7.0 million in the three-month period ended March 31, 2014 to $12.6 million in the current three-month period, due primarily to an acceleration in our clinical programs, which includes $0.4 million for our German lab operations, as compared to $0 in the 2014 comparative period.

We recognized no licensing revenue in the three-month periods ended March 31, 2015 and 2014. All future licensing fees under our current licensing agreements are dependent upon successful development milestones being achieved by the licensor. During the remainder of 2015, we do not anticipate receiving any significant licensing fees.

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Research and Development

	Three-Month Period Ended March 31,
	2015		2014
	(In thousands)
Research and development expenses	$	12,159	$	5,733
Non-cash research and development expenses		—		1,071
Employee stock option expense		336		175
Depreciation and amortization		69		9
	$	12,564	$	6,988

Research expenses are expenses incurred by us in the discovery of new information that will assist us in the creation and the development of new drugs or treatments. Development expenses are expenses incurred by us in our efforts to commercialize the findings generated through our research efforts.  Our research and development expenses, excluding stock option expense, non-cash expenses and depreciation and amortization, were $12.2 million for the three-month period ended March 31, 2015, and $5.7 million for the three-month period ended March 31, 2014.

Research and development expenses incurred during the three-month period ended March 31, 2015 related primarily to our aldoxorubicin clinical program.  In the three-month period ended March 31, 2015, the development expenses of our program for aldoxorubicin were $10.8 million, as compared to $4.9 million for the same period in 2014. The 2014 aldoxorubicin program expenses include milestone payments to the licensor of $2.0 million for the three-month period ended March 31, 2014. The current three-month period also includes $0.4 million of expenses for our German laboratory, as compared to $0 for the 2014 comparative period. The remainder of our research and development expenses primarily related to research and development support costs. We recorded approximately $0.3 million of non-cash stock option and warrant expense in the three-month period ended March 31, 2015, as compared to $0.2 million in the comparative 2014 period.

General and Administrative Expenses

	Three-Month Period Ended March 31,
	2015		2014
	(In thousands)
General and administrative expenses	$	2,061	$	2,604
Non-cash general and administrative expenses		94		192
Employee stock option expense		955		312
Depreciation and amortization		20		23
	$	3,130	$	3,131

General and administrative expenses include all administrative salaries and general corporate expenses, including legal expenses. Our general and administrative expenses, excluding stock option expense, non-cash expenses and depreciation and amortization, were $2.1 million for the three-month period ended March 31, 2015, and $2.6 million for the same period in 2014. Our general and administrative expenses in the current three-months period, excluding stock option expense, non-cash expenses and depreciation and amortization, decreased by approximately $0.5 million, primarily due to a reduction in legal fees of $0.4 million and a reduction in payroll costs of $0.3 million due to special bonuses paid in the 2014 period, as compared to $0 in the 2015 period. Our insurance costs increased by $0.1 million in the three-month period ended March 31, 2015, as compared to the comparative 2014 period.

Depreciation and Amortization

Depreciation expense reflects the depreciation of our equipment and furnishings.

Interest Income

Interest income was $57,000 for the three-month period ended March 31, 2015 as compared to $71,000 for the same period in 2014. This decrease was related to the decrease in cash and cash equivalents and short term investments.

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Item 3. — Quantitative and Qualitative Disclosures About Market Risk

Our exposure to market risk is limited primarily to interest income sensitivity, which is affected by changes in the general level of U.S. interest rates, particularly because a significant portion of our investments are in short-term debt securities issued by the U.S. government and institutional money market funds. The primary objective of our investment activities is to preserve principal. Due to the nature of our short-term investments, we believe that we are not subject to any material market risk exposure. We do not have any speculative or hedging derivative financial instruments or foreign currency instruments. If interest rates had varied by 10% in the three-month period ended March 31, 2015, it would not have had a material effect on our results of operations or cash flows for that period.

Item 4. — Controls and Procedures

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and our Chief Financial Officer, performed an evaluation of the effectiveness of the design and operation of our disclosure controls and procedures (as defined in Securities Exchange Act Rule 13a-15(e)) as of the end of the quarterly period covered by this Quarterly Report. Based on that evaluation, our Chief Executive Officer and our Chief Financial Officer concluded that our disclosure controls and procedures were effective to ensure that information required to be disclosed by us in reports that we file or submit under the Securities Exchange Act of 1934 is recorded, processed, summarized and reported within the time periods specified in the rules and forms of the SEC.

Changes in Controls over Financial Reporting

There was no change in our internal control over financial reporting that occurred during the quarter ended March 31, 2015 that materially affected, or is reasonably likely to materially affect, our internal control over financial reporting. We continually seek to assure that all of our controls and procedures are adequate and effective. Any failure to implement and maintain improvements in the controls over our financial reporting could cause us to fail to meet our reporting obligations under the SEC’s rules and regulations. Any failure to improve our internal controls to address the weaknesses we have identified could also cause investors to lose confidence in our reported financial information, which could have a negative impact on the trading price of our common stock.

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PART II — OTHER INFORMATION

Item 1A. — Legal Proceedings

The disclosure set forth in Note 12 to our financial statements is herein incorporated by reference.

We are, and in the future may be, subject to legal or administrative actions that could adversely affect our results of operations and our business.

Claims have been threatened and have been brought against the Company and its officers and/or directors. Adverse outcomes with respect to some or all of these claims may result in significant monetary damages or injunctive relief that could adversely affect the Company’s ability to conduct its business. Defending a lawsuit can be expensive and can divert the attention of key employees from operating the Company’s business. Litigation and other claims are subject to inherent uncertainties and management’s view of these matters may change in the future. A material adverse impact on the Company’s financial statements also could occur for the period in which the effect of an unfavorable final outcome becomes probable and reasonably estimable.

Item 6. — Exhibits

The exhibits listed in the accompanying Index to Exhibits are filed as part of this Quarterly Report and incorporated herein by reference.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	CytRx Corporation
Date: May 1, 2015	By:	/s/  JOHN Y. CALOZ
		Name: John Y. Caloz
		Title:   Chief Financial Officer

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INDEX TO EXHIBITS

Exhibit Number	Description
31.1	Certification of Chief Executive Officer Pursuant to 17 CFR 240.13a-14(a)
31.2	Certification of Chief Financial Officer Pursuant to 17 CFR 240.13a-14(a)
32.1	Certification of Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2	Certification of Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.INS	XBRL Instance Document
101.SCH	XBRL Schema Document
101.CAL	XBRL Calculation Linkbase Document
101.DEF	XBRL Definition Linkbase Document
101.LAB	XBRL Label Linkbase Document
101.PRE	XBRL Presentation Linkbase Document

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EX-31.1

Exhibit 31.1

CERTIFICATIONS

I, Steven A. Kriegsman, Chief Executive Officer of CytRx Corporation, certify that:

1.           I have reviewed this quarterly report on Form 10-Q of CytRx Corporation;

2.           Based on my knowledge, this quarterly report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the periods covered by this quarterly report;

3.           Based on my knowledge, the financial statements, and other financial information included in this quarterly report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this quarterly report;

4.           The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)           Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its subsidiaries, is made known to us by others within those entities, particularly during the period in which this quarterly report is being prepared;

(b)           Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)           Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the periods covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.           The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 1, 2015	By:	/s/  STEVEN A. KRIEGSMAN
		Name: Steven A. Kriegsman
		Title:  Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATIONS

I, John Y. Caloz, Chief Financial Officer of CytRx Corporation, certify that:

1.           I have reviewed this quarterly report on Form 10-Q of CytRx Corporation;

2.           Based on my knowledge, this quarterly report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the periods covered by this quarterly report;

3.           Based on my knowledge, the financial statements, and other financial information included in this quarterly report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this quarterly report;

4.           The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a)           Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its  subsidiaries, is made known to us by others within those entities, particularly during the period in which this quarterly report is being prepared;

(b)           Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)           Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the periods covered by this report based on such evaluation; and

(d)           Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.           The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a)           All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: May 1, 2015	By:	/s/  JOHN Y. CALOZ
		Name: John Y. Caloz
		Title: Chief Financial Officer

EX-32.1

Exhibit 32.1

Certification of Chief Executive Officer

Pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of CytRx Corporation (the “Company”) hereby certifies based on his knowledge that:

(i)           the accompanying Quarterly Report on Form 10-Q of the Company for the period ended March 31, 2015 as filed with the Securities and Exchange Commission on the date hereof (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and

(ii)           the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company as of and for the periods covered in the Report.

Date: May 1, 2015	By:	/s/  STEVEN A. KRIEGSMAN
		Name: Steven A. Kriegsman
		Title:   Chief Executive Officer

A signed original of this written statement required by Section 906 of the Sarbanes-Oxley Act of 2002 (Section 906), or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to CytRx Corporation and will be retained by CytRx Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

The foregoing certification is being furnished to the Securities and Exchange Commission as an Exhibit to the Form 10-Q and shall not be considered filed as part of the Form 10-Q.

EX-32.2

Exhibit 32.2

Certification of Chief Financial Officer

Pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, the undersigned officer of CytRx Corporation (the “Company”) hereby certifies based on his knowledge that:

(i)           the accompanying Quarterly Report on Form 10-Q of the Company for the period ended March 31, 2015 as filed with the Securities and Exchange Commission on the date hereof (the “Report”) fully complies with the requirements of Section 13(a) or Section 15(d), as applicable, of the Securities Exchange Act of 1934, as amended; and

(ii)           the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company as of and for the periods covered in the Report.

Date: May 1, 2015	By:	/s/ JOHN Y. CALOZ
		Name: John Y. Caloz
		Title: Chief Financial Officer

A signed original of this written statement required by Section 906 of the Sarbanes-Oxley Act of 2002 (Section 906), or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to CytRx Corporation and will be retained by CytRx Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

The foregoing certification is being furnished to the Securities and Exchange Commission as an Exhibit to the Form 10-Q and shall not be considered filed as part of the Form 10-Q.

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Warrant Liabilities (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Derivative [Line Items]
Gain (loss) on warrant liability	$ (1,871,294)	$ 14,702,904
Warrants [Member]
Derivative [Line Items]
Risk-free interest rate (in hundredths)	0.41%	0.63%
Expected dividend yield (in hundredths)	0.00%	0.00%
Expected lives	1 year 4 months 2 days	2 years 2 months 16 days
Expected volatility (in hundredths)	92.40%	85.70%
Warrants classified as liabilities (in shares)	6,371,854	6,984,716
Gain (loss) on warrant liability	$ (1,871,294)	$ 14,702,904

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Short-term Investments

3 Months Ended

Mar. 31, 2015

Short-term Investments [Abstract]

Short-term Investments

4.Short-term Investments

The Company held $37.1 million of short-term investments at March 31, 2015, as compared to $45.6 million at December 31, 2014.  The Company has classified these investments as available for sale.  These investments are federally insured certificates of deposit in the following amounts and maturities: $15.0 million with a maturity date of August 27, 2015; $12.1 million with a maturity date of April 30, 2015; and $10.0 million with a maturity date of April 23, 2015.

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Equity Transactions (Details) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	3 Months Ended
	Feb. 05, 2014	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Mar. 15, 2014	Feb. 05, 2014
Equity Transactions [Abstract]
Restricted shares granted (in shares)				100,000
Non-cash expense of shares issued		$ 0.6
Stock issued, underwritten public offering, value	86.0
Stock issued, underwritten public offering, value (in shares)	13,200,000
Common stock per share value (in dollars per share)						$ 6.50
Net proceeds from issuance of common stock	80.5
Common stock, shares issued (in shares)		55,921,986		55,921,986	200,000
Warrants issued, rights (in shares)					25,000
Common stock, fair value					0.8
Common shares issued from the exercise of warrants (in shares)			278,000
Proceeds from the issuance of warrants			$ 0.4

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Liquidity and Capital Resources (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Estimated projected expenditure [Line Items]
Cash and cash equivalents	$ 28,052,543	$ 32,218,905	$ 62,028,328	$ 11,483,112
Short-term investments	37,101,506	45,621,593
Currently projected expenditures for clinical programs	56,300,000
Aldoxorubicin [Member]
Estimated projected expenditure [Line Items]
Currently projected expenditures for clinical programs	41,700,000
Other Programs [Member]
Estimated projected expenditure [Line Items]
Currently projected expenditures for clinical programs	2,000,000
General Operation [Member]
Estimated projected expenditure [Line Items]
Currently projected expenditures for clinical programs	3,700,000
Other General and Administrative Expenses [Member]
Estimated projected expenditure [Line Items]
Currently projected expenditures for clinical programs	$ 8,900,000

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Income Taxes (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Minimum [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, expiration date	Dec. 31, 2015
Maximum [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, expiration date	Dec. 31, 2034
Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	227.5
Operating loss carryforwards, unrestricted	165.2
State [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	157.5
Operating loss carryforwards, unrestricted	157.5

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Commitments and contingencies (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015 ClinicalMilestone Lawsuit
Commitments and contingencies [Abstract]
Potential future payments	$ 7.5
Number of clinical milestones	2
Payments made on achievement of clinical milestones	2.0
Potential future milestone payments on each additional final marketing approval	1.0
Loss Contingencies [Line Items]
Number of shareholders lawsuits	3
Legal fees to be reimbursed by insurance carrier	8.6
Receivables carried to balance sheet	$ 5.1
Fishman v. Kriegsman [Member]
Loss Contingencies [Line Items]
Number of external investor and public relations firms unaffiliated with company	2
Silverberg v. Kriegsman [Member]
Loss Contingencies [Line Items]
Number of external investor and public relations firms unaffiliated with company	2
Pankratz v. Kriegsman [Member]
Loss Contingencies [Line Items]
Number of external investor and public relations firms unaffiliated with company	2
Taylor v. Kriegsman [Member]
Loss Contingencies [Line Items]
Number of external investor and public relations firms unaffiliated with company	2

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Recent Accounting Pronouncements

3 Months Ended

Mar. 31, 2015

Recent Accounting Pronouncements [Abstract]

Recent Accounting Pronouncements

3.Recent Accounting Pronouncements

We have reviewed all of the recent accounting pronouncements and have determined that they have not or will not have a material impact on the Company's financial statements, or simply do not apply to the Company's operations.

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CONDENSED BALANCE SHEETS (Unaudited) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 28,052,543	$ 32,218,905
Short-term investments	37,101,506	45,621,593
Receivables	5,153,127	2,019,293
Interest receivable	76,254	104,627
Prepaid expenses and other current assets	930,277	3,250,355
Total current assets	71,313,707	83,214,773
Equipment and furnishings, net	949,305	970,873
Goodwill	183,780	183,780
Other assets	1,319,505	1,323,156
Total assets	73,766,297	85,692,582
Current liabilities:
Accounts payable	4,637,623	6,655,962
Accrued expenses and other current liabilities	10,354,489	5,994,072
Warrant liability	7,002,379	5,131,085
Total current liabilities	21,994,491	17,781,119
Commitments and contingencies
Stockholders' equity
Preferred Stock, $0.01 par value, 5,000,000 shares authorized, including 25,000 shares of Series A Junior Participating Preferred Stock; no shares issued and outstanding	0	0
Common stock, $0.001 par value, 250,000,000 shares authorized; 55,921,986 shares issued and outstanding at March 31, 2015 and December 31, 2014	55,924	55,924
Additional paid-in capital	378,360,877	376,975,984
Treasury stock, at cost (199,275 shares at March 31, 2015 and December 31, 2014)	(2,612,861)	(2,612,861)
Accumulated deficit	(324,032,134)	(306,507,584)
Total stockholders' equity	51,771,806	67,911,463
Total liabilities and stockholders' equity	$ 73,766,297	$ 85,692,582

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Description of Company and Basis of Presentation

3 Months Ended

Mar. 31, 2015

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 ("CytRx" or the "Company") is a biopharmaceutical research and development company specializing in oncology.  The Company currently is focused on the clinical development of aldoxorubicin (formerly known as INNO-206), its modified version of the widely-used chemotherapeutic agent, doxorubicin.  CytRx has initiated under a Special Protocol Assessment, or "SPA," granted by the U.S. Food and Drug Administration, or the "FDA," a pivotal Phase 3 global trial with aldoxorubicin as a therapy for patients with soft tissue sarcomas whose tumors have progressed following treatment with chemotherapy, and has announced that it has received approval from the FDA to continue dosing patients with aldoxorubicin until disease progression in that clinical trial.  CytRx is currently evaluating aldoxorubicin in a global Phase 2b clinical trial in small cell lung cancer, a Phase 2 clinical trial in HIV-related Kaposi's sarcoma, a Phase 2 clinical trial in patients with late-stage glioblastoma (brain cancer), a Phase 1b trial in combination with ifosfamide in patients with soft tissue sarcoma, and a Phase 1b trial in combination with gemcitabine in subjects with metastatic solid tumors.  CytRx has completed a global Phase 2b clinical trial with aldoxorubicin as a first-line therapy for soft tissue sarcomas, a Phase 1b/2 clinical trial primarily in the same indication, a Phase 1b clinical trial of aldoxorubicin in combination with doxorubicin in patients with advanced solid tumors and a Phase 1b pharmacokinetics clinical trial in patients with metastatic solid tumors.  CytRx plans to expand its pipeline of oncology candidates at its laboratory facilities in Freiburg, Germany, based on novel linker technologies that can be utilized with multiple chemotherapeutic agents and may allow for greater concentration of drug at tumor sites.

The accompanying condensed financial statements at March 31, 2015 and for the three-month periods ended March 31, 2015 and 2014, 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, 2014 have been derived from the Company's audited financial statements as of that date.

The financial statements included herein have been prepared by the Company 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, 2014. The Company's operating results will fluctuate for the foreseeable future. Therefore, period-to-period comparisons should not be relied upon as predictive of the results in future periods.

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Foreign Currency Remeasurement (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Foreign Currency Remeasurement [Abstract]
Loss on foreign currency translation adjustment	$ (16,528)	$ 0

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Basic and Diluted Net Income (Loss) Per Common Share (Details) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Basic and Diluted Net Income (Loss) Per Common Share [Abstract]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)	17.5	9.2

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Foreign Currency Remeasurement

3 Months Ended

Mar. 31, 2015

Foreign Currency Remeasurement [Abstract]

Foreign Currency Remeasurement

2.Foreign Currency Remeasurement

The U.S. dollar has been determined to be the functional currency for the net assets of the CytRx German Branch. The transactions are recorded in the local currencies and are remeasured at each reporting date using the historical rates for nonmonetary assets and liabilities and current exchange rates for monetary assets and liabilities at the balance sheet date. Exchange gains and losses from the remeasurement of monetary assets and liabilities are recognized in other income (loss). The Company recognized a loss of approximately $16,528 for the three-month period ended March 31, 2015, and zero for the comparative period in 2014.

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CONDENSED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
Stockholders' equity
Preferred Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred Stock, shares authorized (in shares)	5,000,000	5,000,000
Series A Junior Participating Preferred Stock, shares authorized (in shares)	25,000	25,000
Preferred Stock, shares issued (in shares)	0	0
Preferred Stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	250,000,000	250,000,000
Common stock, shares issued (in shares)	55,921,986	55,921,986
Common stock, shares outstanding (in shares)	55,921,986	55,921,986
Treasury stock (in shares)	199,275	199,275

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Commitments and contingencies

3 Months Ended

Mar. 31, 2015

Commitments and contingencies [Abstract]

Commitments and contingencies

12.Commitments and contingencies

Commitments

The Company has an agreement with KTB for the exclusive license of patent rights held by KTB for the worldwide development and commercialization of aldoxorubicin. Under the agreement, the Company must make payments to KTB in the aggregate of $7.5 million upon meeting clinical and regulatory milestones up to and including the product's second final marketing approval. In the three months ended March 31, 2014, the Company met two clinical milestones, resulting in total payments of $2.0 million to KTB.  The Company also has agreed to pay:

 commercially reasonable royalties based on a percentage of net sales (as defined in the agreement);

 a percentage of non-royalty sub-licensing income (as defined in the agreement); and

 milestones of $1 million for each additional final marketing approval that the Company obtains.

Contingencies

As previously reported, on June 13, 2014, three purported securities class action lawsuits pending in the United States District Court for the Central District of California, were consolidated in the matter of In re CytRx Corporation Securities Litigation, 2:14-CV-01956-GHK (PJWx), and lead plaintiff and lead counsel were appointed. On October 1, 2014, plaintiffs filed a consolidated amended complaint on behalf of all persons who purchased or otherwise acquired the publicly traded securities of CytRx between November 20, 2013 and March 13, 2014, against CytRx, certain Company officers and directors, a freelance writer, and certain underwriters. The complaint alleges that certain of the defendants violated the Securities Exchange Act of 1934 by making materially false and misleading statements in press releases, promotional articles, SEC filings and other public statements. The complaint further alleges that certain of the defendants violated the Securities Act of 1933 by making materially misleading statements and omitting material information in the shelf Registration Statement on Form S-3 filed with the SEC on December 6, 2012 and Prospectus Supplement on Form 424(b)(2) filed with the SEC on January 31, 2014. These allegations arise out of the Company's alleged retention of The DreamTeam Group and MissionIR, external investor and public relations firms unaffiliated with the Company, as well as the Company's December 9, 2013 grant of stock options to certain board members and officers. The consolidated amended complaint seeks damages, including interest, in an unspecified amount, reasonable costs and attorneys' fees, and any equitable, injunctive, or other relief that the court may deem just and proper.  On December 5, 2014, CytRx and the individual defendants filed a motion to dismiss the complaint.  The Court was scheduled to hear argument on this motion on March 2, 2015.  On February 25, 2015, the Court took this motion under submission and took the hearing off calendar.

Also, on April 3, 2014, as previously reported, a purported class action lawsuit was filed against the Company and certain officers and each director, as well as certainunderwriters, in the Superior Court of California, County of Los Angeles, captioned Rajasekaran v. CytRx Corporation, et al., BC541426. The complaint purports to be brought on behalf of all shareholders who purchased or otherwise acquired the Company's common stock pursuant and/or traceable to the Company's secondary common stock offering, which closed on February 5, 2014. The complaint alleges that defendants violated the federal securities laws by making materially false and misleading statements in filings with the SEC. The complaint seeks compensatory damages in an unspecified amount, rescission, and attorney's fees and costs.  On October 14, 2014, the court granted the parties' joint ex parte motion to stay this proceeding pending resolution of motions to dismiss in the related federal action, In re CytRx Corporation Securities Litigation, 2:14-CV-01956-GHK (PJWx).

As previously reported, on July 3, 2014, a shareholder derivative lawsuit was filed in the United States District Court for the Central District of California, captioned Fishman v. Kriegsman, et al., 2:14-cv-05169, against nominal defendant CytRx and certain officers and each director of the Company. The complaint alleges breach of fiduciary duties, corporate waste, gross mismanagement, and unjust enrichment in connection with the Company's alleged retention of DreamTeamGroup and MissionIR, two external investor and public relations firms unaffiliated with the Company.  The complaint seeks damages, restitution, corporate governance reforms, and attorney's fees and costs.  On September 3, 2014, plaintiff filed a notice to voluntarily dismiss this action against all parties without prejudice, which the court granted on September 9, 2014. On June 13, 2014, the Delaware Court of Chancery consolidated Schwartz v. Ignarro, et al., Case No. 9864, Johnson v. Ignarro, et al., Case No. 9884, and Silverberg v. Kriegsman, et al., Case No. 9919, three shareholder derivative lawsuits described in our Quarterly Report filed with the SEC on August 6, 2014.  The allegations in the Schwartz and Johnson complaints relate to the Company's December 9, 2013 grant of stock options to certain board members and officers.  The allegations in the Silverberg complaint relate to the Company's December 9, 2013 grant of stock options to certain board members and officers as well as the Company's alleged retention of DreamTeamGroup and MissionIR, two external investor and public relations firms unaffiliated with the Company.  A consolidated complaint was filed on October 9, 2014.On November 10, 2014, CytRx and the individual defendants filed a motion to dismiss the complaint or, in the alternative, to stay the action. The Delaware Court of Chancery heard argument on the motions on January 8, 2015. The Court denied the motion to dismiss and granted in part and denied in part the motion to stay. On August 14, 2014, a shareholder derivative lawsuit, captioned Pankratz v. Kriegsman, et al., 2:14-cv-06414-PA-JPR, was filed in the United States District Court for the Central District of California against CytRx, as nominal defendant, and certain officers and each director.  The complaint alleges breach of fiduciary duties, unjust enrichment, gross mismanagement, abuse of control, insider selling and misappropriation of information in connection with the Company's alleged retention of DreamTeamGroup and MissionIR, two external investor and public relations firms unaffiliated with the Company, as well as the Company's December 9, 2013 grant of stock options to certain board members and officers.  The complaint seeks unspecified damages, corporate governance and internal procedures reforms, restitution, disgorgement of all profits, benefits, and other compensation obtained by the individual defendants, and the costs and disbursements of the action. On August 15, 2014, a shareholder derivative complaint, captioned Taylor v. Kriegsman, et al., 2:14-cv-06451, was filed in the United States District Court for the Central District of California against CytRx, as nominal defendant, and certain officers and each director. The complaint alleges breach of fiduciary duties, unjust enrichment, gross mismanagement, abuse of control, unjust enrichment, insider selling and misappropriation of information in connection with the Company's alleged retention of DreamTeamGroup and MissionIR, two external investor and public relations firms unaffiliated with the Company, as well as the Company's December 9, 2013 grant of stock options to certain board members and officers. The complaint seeks unspecified damages, corporate governance and internal procedures reforms, restitution, disgorgement of all profits, benefits, and other compensation obtained by the individual defendants, and the costs and disbursements of the action. On February 27, 2015, the Pankratz and Taylor plaintiffs filed a motion to vacate the stay. The Court took the matter under advisement and has not yet ruled on the motion.On October 8, 2014, the court in Pankratz and Taylor consolidated the cases and appointed lead plaintiffs and co-lead counsel. On October 20, 2014, the Company and the individual defendants filed motions to dismiss the consolidated Pankratz and Taylor cases or, in the alternative, to stay the cases. On January 9, 2015, the Court stayed the action pending the resolution of the consolidated Delaware derivative action. On February 27, 2015, the Pankratz and Taylor plaintiffs filed a motion to vacate the stay. The Court took the matter under advisement and has not yet ruled on the motion.

We intend to vigorously defend against the foregoing complaints. The Company has directors' and officers' liability insurance, which will be utilized in the defense of these matters. As of March 31, 2015, the Company has submitted $8.6 million of expenses to its insurance carrier for reimbursement, of which $5.1 million remains in the Receivables on the accompanying Condensed Balance Sheet. The Company expects to recover this amount from its insurance carrier. The liability insurance may not cover all of the future liabilities the Company may incur in connection with the foregoing matters. We record accruals for loss contingencies to the extent that we conclude that it is probable that a liability has been incurred and the amount of the related loss can be reasonably estimated. Based on the very early stage of litigation, it is not possible to estimate the amount or range of possible loss that might result from an adverse judgment or a settlement of these matters. We evaluate developments in legal proceedings and other matters on a quarterly basis.

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Document and Entity Information	3 Months Ended
	Mar. 31, 2015	May 01, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	CYTRX CORP
Entity Central Index Key	0000799698
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		55,722,711
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2015

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Warrant Liabilities (Tables)

3 Months Ended

Mar. 31, 2015

Warrant Liabilities [Abstract]

Schedule of weighted-average assumptions

The following reflects the weighted-average assumptions for each of the three-month periods indicated:

	Three Months Ended March 31,
	2015			2014
Risk-free interest rate		0.41	%		0.63	%
Expected dividend yield		0	%		0	%
Expected lives		1.34			2.21
Expected volatility		92.4	%		85.7	%
Warrants classified as liabilities (in shares)		6,371,854			6,984,716
Gain (loss) on warrant liability	$	(1,871,294	)	$	14,702,904

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CONDENSED STATEMENTS OF OPERATIONS (Unaudited) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Revenue:
License revenue	$ 0	$ 0
Expenses:
Research and development	12,563,745	6,987,848
General and administrative	3,130,232	3,131,074
Total Expenses	15,693,977	10,118,922
Loss before other income (loss)	(15,693,977)	(10,118,922)
Other income (loss):
Interest income	56,574	70,638
Other income (loss), net	(15,853)	9,898
Gain (loss) on warrant derivative liability	(1,871,294)	14,702,904
Net income (loss)	$ (17,524,550)	$ 4,664,518
Basic net income (loss) per share (in dollars per share)	$ (0.31)	$ 0.09
Basic weighted-average shares outstanding (in shares)	55,722,710	50,314,719
Diluted net income (loss) per share (in dollars per share)	$ (0.31)	$ 0.08
Diluted weighted-average shares outstanding (in shares)	55,722,710	55,727,056

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Stock Based Compensation

3 Months Ended

Mar. 31, 2015

Stock Based Compensation [Abstract]

Stock Based Compensation

7.Stock Based Compensation

The Company has a 2000 Long-Term Incentive Plan, which expired on August 6, 2010.  As of March 31, 2015, there were approximately 0.7 million shares subject to outstanding stock options under this plan.  No further shares are available for future grant under this plan.

The Company also has a 2008 Stock Incentive Plan.  As of March 31, 2015, there were 9.5 million shares subject to outstanding stock options and 0.5 million shares available for future grant under this plan.

The Company follows ASC 718, Compensation-Stock Compensation, which requires the measurement and recognition of compensation expense for all stock-based awards made to employees.

For stock options and stock warrants paid in consideration of services rendered by non-employees, the Company recognizes compensation expense in accordance with the requirements of ASC 505-50.

Non-employee option grants that do not vest immediately upon grant are recorded as an expense over the vesting period. At the end of each financial reporting period, the value of these options, as calculated using the Black-Scholes option-pricing model, is determined, and compensation expense recognized or recovered during the period is adjusted accordingly. Since the fair market value of options granted to non-employees is subject to change in the future, the amount of the future compensation expense is subject to adjustment until the common stock options are fully vested.

The following table sets forth the total stock-based compensation expense resulting from stock options and warrants included in the Company's unaudited interim statements of operations:

	Three Months Ended March 31,
	2015		2014
Research and development — employee	$	335,938	$	175,153
General and administrative — employee		955,404		311,960
Total employee stock-based compensation	$	1,291,342	$	487,113
Research and development — non-employee	$	—	$	86,539
General and administrative — non-employee		93,551		191,992
Total non-employee stock-based compensation	$	93,551	$	278,531

During the three-month period ended March 31, 2015, the Company granted stock options to purchase 180,000  shares of its common stock, and during the corresponding 2014 period, the Company granted stock options to purchase 270,000 shares of its common stock and warrants to purchase 25,000 shares of its common stock at an exercise price of $5.60. The fair value of the stock options and warrants was estimated using the Black-Scholes option-pricing model, based on the following assumptions:

	Three months Ended March 31, 2015			Three Months Ended March 31, 2014
Risk-free interest rate		2.20	%		1.98	%
Expected volatility		84.3	%		87.8% - 89.6	%
Expected lives (years)		10			6 - 10
Expected dividend yield		0.00	%		0.00	%

The Company's computation of expected volatility is based on the historical daily volatility of its publicly traded stock.  The Company uses historical information to compute expected lives. In the three-month period ended March 31, 2015, the contractual term and the expected life of the options granted was ten years. The dividend yield assumption of zero is based upon the fact the Company has never paid cash dividends and presently has no intention to do so.  The risk-free interest rate used for each grant and issuance is equal to the U.S. Treasury rates in effect at the time of the grant and issuance for instruments with a similar expected life. Based on historical experience, for the three-month period ended March 31, 2015, the Company has estimated an annualized forfeiture rate of 10% for options granted to its employees, 2% for options granted to senior management and 0% for options granted to directors and non-employees and warrants issued to non-employees.  For the comparative three-month period ended March 31, 2014, the Company has estimated an annualized forfeiture rate of 12% for options granted to its employees, 2% for options granted to senior management and 0% for options granted to directors and non-employees.  Compensation costs will be adjusted for future changes in estimated forfeitures.  The Company will record additional expense if the actual forfeitures are lower than estimated and will record a recovery of prior expense if the actual forfeiture rates are higher than estimated.  No amounts relating to stock-based compensation have been capitalized.

As of March 31, 2015, there remained approximately $5.6 million of unrecognized compensation expense related to unvested stock options granted to current and former employees and directors, which expect will be recognized over a weighted-average period of 1.14 years. Presented below is the Company's stock option activity:

	Three months Ended March 31, 2015
	Number of Options (Employees)		Number of Options (Non-Employees)			Total Number of Options			Weighted-Average Exercise Price
Outstanding at January 1, 2015		9,348,592		692,143			10,040,735		$	2.87
Granted		180,000		—			180,000		$	3.15
Exercised, forfeited or expired		—		(56,429	)		(56,429	)	$	8.54
Outstanding at March 31, 2015		9,528,592		635,714			10,164,306		$	2.84
Options exercisable at March 31, 2015		5,528,887		635,714			6,164,601		$	3.14

The following table summarizes significant ranges of outstanding stock options under the Company's plans at March 31, 2015:

Range of Exercise Prices		Number of Options		Weighted-Average Remaining Contractual Life (years)		Weighted-Average Exercise Price		Number of Options Exercisable		Weighted-Average Remaining Contractual Life (years)		Weighted-Average Exercise Price
$	1.83 - $2.50		7,932,556		8.74	$	2.19		4,212,622		8.33	$	2.17
$	2.51 – $3.50		954,482		8.89	$	2.85		873,054		8.87	$	2.83
$	3.51 – $8.00		989,201		5.79	$	6.27		790,858		5.01	$	6.50
$	8.01 – $32.55		288,067		2.56	$	9.00		288,067		2.56	$	9.00
			10,164,306		8.29	$	2.84		6,164,601		7.71	$	3.14

The aggregate intrinsic value of outstanding options and options vested as of March 31, 2015 were $9.8 million and $5.5 million respectively, which represents the exercise price of the options below the fair market value of the Company's common stock on March 31, 2015 of $3.37 per share.

There were 7,292,617 and 7,349,760 warrants outstanding at March 31, 2015 and December 31, 2014, respectively at a weighted-average price of $4.29 and $4.27, respectively.

Restricted Stock

On January 1, 2014, the Company granted to Dr. Daniel Levitt, Executive Vice President and Chief Medical Officer, 100,000 CytRx Corporation restricted shares of common stock of the Company pursuant to the 2008 Plan, which shares have now fully vested.  The fair value of the restricted stock is based on the market price of the Company's common stock on the grant date less the par value received as consideration. The fair value of the restricted shares granted on January 1, 2014 was $627,000. The stock-based compensation expense relating to restricted stock included in the company's unaudited statements of operations for the three-month period ended March 31, 2014 was $154,578.  No restricted shares of common stock of the Company were granted in the first period of 2015.

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Warrant Liabilities

3 Months Ended

Mar. 31, 2015

Warrant Liabilities [Abstract]

Warrant Liabilities

6.Warrant Liabilities

Liabilities measured at market value on a recurring basis include warrant liabilities resulting from the Company's past equity financings.  In accordance with ASC 815-40, Derivatives and Hedging – Contracts in Entity's Own Equity ("ASC 815-40"), the warrant liabilities are being marked to market until they are completely settled.  The warrants are valued using the Black-Scholes method, using assumptions consistent with the Company's application of ASC 505-50, Equity-Based Payments to Non-Employees ("ASC 505-50").  The gain or loss resulting from the marked to market calculation is shown on the Condensed Statements of Operations as gain (loss) on warrant derivative liability. The Company recognized a loss of $1.9 million and a gain of $14.7 million for the three-month periods ended March 31, 2015 and 2014, respectively. The following reflects the weighted-average assumptions for each of the three-month periods indicated:

	Three Months Ended March 31,
	2015			2014
Risk-free interest rate		0.41	%		0.63	%
Expected dividend yield		0	%		0	%
Expected lives		1.34			2.21
Expected volatility		92.4	%		85.7	%
Warrants classified as liabilities (in shares)		6,371,854			6,984,716
Gain (loss) on warrant liability	$	(1,871,294	)	$	14,702,904

The Company's computation of expected volatility is based on the historical daily volatility of its publicly traded stock. The dividend yield assumption of zero is based upon the fact that the Company has never paid cash dividends and presently has no intention to do so.  The risk-free interest rate used for each warrant classified as a derivative is equal to the U.S. Treasury rates in effect at March 31 of each year presented. The expected lives are based on the remaining contractual lives of the related warrants at the valuation date.

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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	$ 37,101,506	$ 45,621,593
Certificates of Deposit [Member] | Maturity date of August 27, 2015 [Member]
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	15,000,000
Certificates of Deposit [Member] | Maturity Date of April 30, 2015 [Member]
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	12,100,000
Certificates of Deposit [Member] | Maturity Date of April 23, 2015 [Member]
Schedule of Available-for-sale Securities [Line Items]
Short-term investments	$ 10,000,000

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Stock Based Compensation (Tables)

3 Months Ended

Mar. 31, 2015

Stock Based Compensation [Abstract]

Schedule of total stock-based compensation expense from stock options and warrants

The following table sets forth the total stock-based compensation expense resulting from stock options and warrants included in the Company's unaudited interim statements of operations:

	Three Months Ended March 31,
	2015		2014
Research and development — employee	$	335,938	$	175,153
General and administrative — employee		955,404		311,960
Total employee stock-based compensation	$	1,291,342	$	487,113
Research and development — non-employee	$	—	$	86,539
General and administrative — non-employee		93,551		191,992
Total non-employee stock-based compensation	$	93,551	$	278,531

Schedule of share-based payment award, fair value of the stock options granted , assumptions

The fair value of the stock options and warrants was estimated using the Black-Scholes option-pricing model, based on the following assumptions:

	Three months Ended March 31, 2015			Three Months Ended March 31, 2014
Risk-free interest rate		2.20	%		1.98	%
Expected volatility		84.3	%		87.8% - 89.6	%
Expected lives (years)		10			6 - 10
Expected dividend yield		0.00	%		0.00	%

Schedule of share-based compensation, stock options, activity

Presented below is the Company's stock option activity:

	Three months Ended March 31, 2015
	Number of Options (Employees)		Number of Options (Non-Employees)			Total Number of Options			Weighted-Average Exercise Price
Outstanding at January 1, 2015		9,348,592		692,143			10,040,735		$	2.87
Granted		180,000		—			180,000		$	3.15
Exercised, forfeited or expired		—		(56,429	)		(56,429	)	$	8.54
Outstanding at March 31, 2015		9,528,592		635,714			10,164,306		$	2.84
Options exercisable at March 31, 2015		5,528,887		635,714			6,164,601		$	3.14

Schedule of share-based compensation, summarizes significant ranges of outstanding stock options

The following table summarizes significant ranges of outstanding stock options under the Company's plans at March 31, 2015:

Range of Exercise Prices		Number of Options		Weighted-Average Remaining Contractual Life (years)		Weighted-Average Exercise Price		Number of Options Exercisable		Weighted-Average Remaining Contractual Life (years)		Weighted-Average Exercise Price
$	1.83 - $2.50		7,932,556		8.74	$	2.19		4,212,622		8.33	$	2.17
$	2.51 – $3.50		954,482		8.89	$	2.85		873,054		8.87	$	2.83
$	3.51 – $8.00		989,201		5.79	$	6.27		790,858		5.01	$	6.50
$	8.01 – $32.55		288,067		2.56	$	9.00		288,067		2.56	$	9.00
			10,164,306		8.29	$	2.84		6,164,601		7.71	$	3.14

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Equity Transactions

3 Months Ended

Mar. 31, 2015

Equity Transactions [Abstract]

Equity Transactions

10.Equity Transactions

On January 1, 2014, the Company granted 100,000 shares of restricted stock to Dr. Daniel Levitt, Executive Vice President and Chief Medical Officer (see Note 7), which resulted in non-cash expense of $0.6 million.

On February 5, 2014, the Company completed an $86.0 million underwritten public offering, in which it sold and issued 13.2 million shares of common stock at a price of $6.50 per share. Net of underwriting discounts, legal, accounting and other offering expenses, the Company received proceeds of approximately $80.5 million.

On March 15, 2014, the Company issued 200,000 common shares and warrants to purchase 25,000 common shares to KTB Tumorforschungs GmbH, or "KTB," the licensor of aldoxorubicin, in connection with the establishment of the Company's Freiburg, Germany research and development laboratory. The fair value of the newly-issued shares was $0.8 million.

In the first quarter of 2014, the Company issued approximately 278,000 common shares for $0.4 million resulting from the exercise of warrants.

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Fair Value Measurements

3 Months Ended

Mar. 31, 2015

Fair Value Measurements [Abstract]

Fair Value Measurements

8.Fair Value Measurements

Assets and liabilities recorded at fair value on the balance sheets are categorized based upon the level of judgment associated with the inputs used to measure the fair value.  Level inputs are as follows:

Level 1 – quoted prices in active markets for identical assets or liabilities.

Level 2 – other significant observable inputs for the assets or liabilities through corroboration with market data at the measurement date.

Level 3 – significant unobservable inputs that reflect management's best estimate of what market participants would use to price the assets or liabilities at the measurement date.

The following table summarizes fair value measurements by level at March 31, 2015 for assets and liabilities measured at fair value on a recurring basis:

(In thousands)	Level I		Level II		Level III			Total
Cash equivalents	$	27,429	$	—	$	—		$	27,429
Short-term investments		37,102		—		—			37,102
Warrant liability		—		—		(7,002	)		(7,002	)

The following table summarizes fair value measurements by level at December 31, 2014 for assets and liabilities measured at fair value on a recurring basis:

(In thousands)	Level I		Level II		Level III			Total
Cash equivalents	$	31,159	$	—	$	—		$	31,159
Short-term investments		45,622		—		—			45,622
Warrant liability		—		—		(5,131	)		(5,131	)

Liabilities measured at market value on a recurring basis include warrant liability resulting from the Company's August 2011 equity financing. In accordance with ASC 815-40, the warrant liability are marked to market each quarter-end until they are completely settled. The warrants are valued using the Black-Scholes method, using assumptions consistent with the Company's application of ASC 505-50. The change in the fair value of the liabilities classified in Level III is due to the unrealized loss of $1.9 million recognized and the gain is presented in the Condensed Statement of Operations (see Note 6).

The Company considers carrying amounts of accounts receivable, accounts payable and accrued expenses to approximate fair value due to the short-term nature of these financial instruments.  

The Company's non-financial assets are measured at fair value when there is an indicator of impairment and recorded at fair value only when an impairment charge is recognized.  The Company's non-financial assets were not material at March 31, 2015 or 2014.

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Liquidity and Capital Resources

3 Months Ended

Mar. 31, 2015

Liquidity and Capital Resources [Abstract]

Liquidity and Capital Resources

9.Liquidity and Capital Resources

At March 31, 2015, the Company had cash and cash equivalents of approximately $28.1 million and short-term investments of approximately $37.1 million.  Management believes that the Company's current cash and cash equivalents and short-term investments will be sufficient to fund its operations for the foreseeable future.  The estimate is based, in part, upon the Company's currently projected expenditures for the remainder of 2015 and the first three months of 2016 of approximately $56.3 million, whichincludes approximately $41.7 million for its clinical programs for aldoxorubicin, approximately $2.0 million for pre-clinical development of new albumin-binding cancer drug candidates, approximately $3.7 million for general operation of its clinical programs, and approximately $8.9 million for other general and administrative expenses. These projected expenditures are also based upon numerous other assumptions and subject to many uncertainties, and the Company's actual expenditures may be significantly different from these projections.

If the Company obtains marketing approval and successfully commercializes aldoxorubicin or other product candidates, the Company anticipates it could take severalyears for it to generate significant recurring revenue.  The Company will be dependent on future financing and possible strategic partnerships until such time, if ever, as it can generate significant recurring revenue. The Company has no commitments from third parties to provide any additional financing, and it may not be able to obtain future financing on favorable terms, or at all. If the Company fails to obtain sufficient funding when needed, it may be forced to delay, scale back or eliminate all or a portion of its development programs or clinical trials, seek to license to other companies its product candidates or technologies that it would prefer to develop and commercialize itself, or seek to sell some or all of its assets or merge with or be acquired by another company.

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Income Taxes

3 Months Ended

Mar. 31, 2015

Income Taxes [Abstract]

Income Taxes

11.Income Taxes

At December 31, 2014, the Company had federal and state net operating loss carryforwards as of  $227.5 million and $157.5 million, respectively, available to offset against future taxable income, which expire in 2015 through 2034, of which $165.2 million and $157.5 million, respectively, are not subject to limitation under Section 382 of the Internal Revenue Code.

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Description of Company and Basis of Presentation (Details)	3 Months Ended
	Mar. 31, 2015 Program
Description of Company and Basis of Presentation [Abstract]
Number of programs in clinical development for cancer indications	2

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Stock Based Compensation (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Feb. 05, 2014
Number of Options (Employees and Non-Employees) [Abstract]
Outstanding at beginning of period (in shares)			100,000
Outstanding at end of period (in shares)			100,000
Share based compensation, shares authorized under significant ranges of outstanding stock option plans in period [Abstract]
Closing price of the common stock (in dollars per share)				$ 6.50
Employees [Member]
Share-based compensation arrangement by share-based payment award, fair value assumptions and methodology [Abstract]
Estimated annualized forfeiture rate (in hundredths)	10.00%	12.00%
Employees and Directors [Member]
Share-based compensation arrangement by share-based payment award, fair value assumptions and methodology [Abstract]
Unrecognized compensation expense related to unvested stock options, granted	5,600,000
Unrecognized compensation cost, recognized as expense over a weighted-average period	1 year 1 month 20 days
Senior management [Member]
Share-based compensation arrangement by share-based payment award, fair value assumptions and methodology [Abstract]
Estimated annualized forfeiture rate (in hundredths)	2.00%	2.00%
Directors and nonemployees [Member]
Share-based compensation arrangement by share-based payment award, fair value assumptions and methodology [Abstract]
Estimated annualized forfeiture rate (in hundredths)	0.00%	0.00%
Stock Options [Member]
Share-based compensation arrangement by share-based payment award, fair value assumptions and methodology [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Method Used	Black-Scholes option-pricing model
Contractual term	10 years
Number of Options (Employees and Non-Employees) [Abstract]
Outstanding at beginning of period (in shares)	10,040,735
Granted (in shares)	180,000	270,000
Exercised, forfeitures or expired (in shares)	(56,429)
Outstanding at end of period (in shares)	10,164,306
Options exercisable at end of period (in shares)	6,164,601
Weighted-Average Exercise Price Options [Abstract]
Outstanding at beginning of period (in dollars per share)	2.87
Granted (in dollars per share)	3.15
Exercised, forfeitures or expired (in dollars per share)	8.54
Outstanding at end of period (in dollars per share)	2.84
Options exercisable at end of period (in dollars per share)	3.14
Share based compensation, shares authorized under significant ranges of outstanding stock option plans in period [Abstract]
Number of Options (in shares)	10,164,306
Weighted-Average Remaining Contractual Life	8 years 3 months 14 days
Weighted-Average Exercise Price (in dollars per share)	2.84
Number of Options Exercisable (in shares)	6,164,601
Weighted-Average Remaining Contractual Life	7 years 8 months 16 days
Weighted-Average Exercise Price, Options Exercisable (in dollars per share)	3.14
The aggregate intrinsic value of outstanding options	9,800,000
Aggregate intrinsic value of options vested	5,500,000
Closing price of the common stock (in dollars per share)	3.37
Stock Options [Member] | Range $ 1.83 - 2.50 [Member]
Share based compensation, shares authorized under significant ranges of outstanding stock option plans in period [Abstract]
Range of Exercise Prices, Lower Range (in dollars per share)	1.83
Range of Exercise Prices, Upper Range (in dollars per share)	2.50
Number of Options (in shares)	7,932,556
Weighted-Average Remaining Contractual Life	8 years 8 months 26 days
Weighted-Average Exercise Price (in dollars per share)	2.19
Number of Options Exercisable (in shares)	4,212,622
Weighted-Average Remaining Contractual Life	8 years 3 months 29 days
Weighted-Average Exercise Price, Options Exercisable (in dollars per share)	2.17
Stock Options [Member] | Range $ 2.51 - 3.50 [Member]
Share based compensation, shares authorized under significant ranges of outstanding stock option plans in period [Abstract]
Range of Exercise Prices, Lower Range (in dollars per share)	2.51
Range of Exercise Prices, Upper Range (in dollars per share)	3.50
Number of Options (in shares)	954,482
Weighted-Average Remaining Contractual Life	8 years 10 months 20 days
Weighted-Average Exercise Price (in dollars per share)	2.85
Number of Options Exercisable (in shares)	873,054
Weighted-Average Remaining Contractual Life	8 years 10 months 13 days
Weighted-Average Exercise Price, Options Exercisable (in dollars per share)	2.83
Stock Options [Member] | Range $ 3.51 - 8.00 [Member]
Share based compensation, shares authorized under significant ranges of outstanding stock option plans in period [Abstract]
Range of Exercise Prices, Lower Range (in dollars per share)	3.51
Range of Exercise Prices, Upper Range (in dollars per share)	8.00
Number of Options (in shares)	989,201
Weighted-Average Remaining Contractual Life	5 years 9 months 14 days
Weighted-Average Exercise Price (in dollars per share)	6.27
Number of Options Exercisable (in shares)	790,858
Weighted-Average Remaining Contractual Life	5 years 0 months 4 days
Weighted-Average Exercise Price, Options Exercisable (in dollars per share)	6.50
Stock Options [Member] | Range $ 8.01 - 32.55 [Member]
Share based compensation, shares authorized under significant ranges of outstanding stock option plans in period [Abstract]
Range of Exercise Prices, Lower Range (in dollars per share)	8.01
Range of Exercise Prices, Upper Range (in dollars per share)	32.55
Number of Options (in shares)	288,067
Weighted-Average Remaining Contractual Life	2 years 6 months 22 days
Weighted-Average Exercise Price (in dollars per share)	9.00
Number of Options Exercisable (in shares)	288,067
Weighted-Average Remaining Contractual Life	2 years 6 months 22 days
Weighted-Average Exercise Price, Options Exercisable (in dollars per share)	9.00
Stock Options [Member] | Employees [Member]
Number of Options (Employees and Non-Employees) [Abstract]
Outstanding at beginning of period (in shares)	9,348,592
Granted (in shares)	180,000
Exercised, forfeitures or expired (in shares)	0
Outstanding at end of period (in shares)	9,528,592
Options exercisable at end of period (in shares)	5,528,887
Stock Options [Member] | Non employees [Member]
Number of Options (Employees and Non-Employees) [Abstract]
Outstanding at beginning of period (in shares)	692,143
Granted (in shares)	0
Exercised, forfeitures or expired (in shares)	(56,429)
Outstanding at end of period (in shares)	635,714
Options exercisable at end of period (in shares)	635,714
Stock Options And Warrants [Member]
Share-based compensation arrangement by share-based payment award, fair value assumptions and methodology [Abstract]
Risk-free interest rate (in hundredths)	2.20%	1.98%
Expected volatility (in hundredths)	84.30%
Expected lives	10 years
Expected dividend yield (in hundredths)	0.00%	0.00%
Stock Options And Warrants [Member] | Employees [Member]
Total stock-based compensation expense resulting from stock options and warrants [Abstract]
Allocated employee and non-employee stock-based compensation expense, Total	1,291,342	487,113
Stock Options And Warrants [Member] | Non-Employees [Member]
Total stock-based compensation expense resulting from stock options and warrants [Abstract]
Allocated employee and non-employee stock-based compensation expense, Total	93,551	278,531
Stock Options And Warrants [Member] | Research and Development Expense [Member] | Employees [Member]
Total stock-based compensation expense resulting from stock options and warrants [Abstract]
Allocated employee and non-employee stock-based compensation expense, Total	335,938	175,153
Stock Options And Warrants [Member] | Research and Development Expense [Member] | Non-Employees [Member]
Total stock-based compensation expense resulting from stock options and warrants [Abstract]
Allocated employee and non-employee stock-based compensation expense, Total	0	86,539
Stock Options And Warrants [Member] | General and Administrative Expense [Member] | Employees [Member]
Total stock-based compensation expense resulting from stock options and warrants [Abstract]
Allocated employee and non-employee stock-based compensation expense, Total	955,404	311,960
Stock Options And Warrants [Member] | General and Administrative Expense [Member] | Non-Employees [Member]
Total stock-based compensation expense resulting from stock options and warrants [Abstract]
Allocated employee and non-employee stock-based compensation expense, Total	93,551	191,992
Stock Options And Warrants [Member] | Minimum [Member]
Share-based compensation arrangement by share-based payment award, fair value assumptions and methodology [Abstract]
Expected volatility (in hundredths)		87.80%
Expected lives		6 years
Stock Options And Warrants [Member] | Maximum [Member]
Share-based compensation arrangement by share-based payment award, fair value assumptions and methodology [Abstract]
Expected volatility (in hundredths)		89.60%
Expected lives		10 years
Restricted Stock [Member]
Total stock-based compensation expense resulting from stock options and warrants [Abstract]
Allocated employee and non-employee stock-based compensation expense, Total	0	154,578
Warrants [Member]
Weighted-Average Exercise Price Options [Abstract]
Share-based compensation arrangement by share-based payment award, shares issued in period (in shares)		25,000
Exercise price of warrants (in dollars per share)		5.60
Share based compensation, shares authorized under significant ranges of outstanding stock option plans in period [Abstract]
Warrants outstanding (in shares)	7,292,617		7,349,760
Weighted-average price of warrants outstanding (in dollars per share)	4.29		4.27
2000 Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, shares subject to stock options (in shares)	700,000
Expiration date	Aug. 06, 2010
Share-based compensation, shares available for future grant (in shares)	0
2008 Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, shares subject to stock options (in shares)	9,500,000
Share-based compensation, shares available for future grant (in shares)	500,000
2008 Stock Incentive Plan [Member] | Restricted Stock [Member] | Senior management [Member]
Weighted-Average Exercise Price Options [Abstract]
Restricted stock granted (in shares)	100,000
Value of restricted shares issued	627,000

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CONDENSED STATEMENTS OF CASH FLOWS (Unaudited) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities:
Net income (loss)	$ (17,524,550)	$ 4,664,518
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation and amortization	88,490	32,659
Stock-based compensation expense	1,384,893	1,750,222
Fair value adjustment on warrant liability	1,871,294	(14,702,904)
Net foreign exchange gain (loss)	(47)	177
Changes in assets and liabilities:
Receivables	(3,133,834)	85,760
Interest receivable	28,373	(19,311)
Prepaid expenses and other current assets	2,323,729	621,839
Accounts payable	(2,025,513)	410,109
Accrued expenses and other current liabilities	4,360,417	244,378
Net cash used in operating activities	(12,626,748)	(6,912,553)
Cash flows from investing activities:
Purchase of short-term investments	(15,000,000)	(23,500,000)
Proceeds from the sale of short-term investments	23,520,087	0
Purchases of equipment and furnishings	(59,701)	(6,623)
Net cash provided by (used in) investing activities	8,460,386	(23,506,623)
Cash flows from financing activities:
Net proceeds from public offering	0	80,535,401
Proceeds from issuance of restricted stock to employee	0	100
Net proceeds from exercise of warrants and stock options	0	428,891
Net cash provided by financing activities	0	80,964,392
Net increase (decrease) in cash and cash equivalents	(4,166,362)	50,545,216
Cash and cash equivalents at beginning of period	32,218,905	11,483,112
Cash and cash equivalents at end of period	28,052,543	62,028,328
Supplemental disclosure of cash flow information:
Equipment and furnishings purchased on credit	7,221	7,542
Cashless warrant exercises	0	133
Cash paid for income taxes	$ 800	$ 3,151

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Basic and Diluted Net Income (Loss) Per Common Share

3 Months Ended

Mar. 31, 2015

Basic and Diluted Net Income (Loss) Per Common Share [Abstract]

Basic and Diluted Net Income (Loss) Per Common Share

5.Basic and Diluted Net Income (Loss) Per Common Share

Basic and diluted net loss per common share is computed based on the weighted-average number of common shares outstanding. Common share equivalents (which consist of options, warrants and restricted stock) are excluded from the computation of diluted net income (loss) per common share where the effect would be anti-dilutive.  Common share equivalents that could potentially dilute net income (loss) per share in the future, and which were excluded from the computation of diluted loss per share, totaled 17.5 million shares for the three-month period ended March 31, 2015, and 9.2 million shares for the three-month period ended March 31, 2014.

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Fair Value Measurements (Details) (Recurring [Member], USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
Fair value measurements by level for assets and liabilities measured at fair value on a recurring basis [Abstract]
Cash equivalents	$ 27,429,000	$ 31,159,000
Short-term investments	37,102,000	45,622,000
Warrant liability	(7,002,000)	(5,131,000)
Level I [Member]
Fair value measurements by level for assets and liabilities measured at fair value on a recurring basis [Abstract]
Cash equivalents	27,429,000	31,159,000
Short-term investments	37,102,000	45,622,000
Warrant liability	0	0
Level II [Member]
Fair value measurements by level for assets and liabilities measured at fair value on a recurring basis [Abstract]
Cash equivalents	0	0
Short-term investments	0	0
Warrant liability	0	0
Level III [Member]
Fair value measurements by level for assets and liabilities measured at fair value on a recurring basis [Abstract]
Cash equivalents	0	0
Short-term investments	0	0
Warrant liability	(7,002,000)	(5,131,000)
Unrealized loss recognized	$ (1,900,000)

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Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2015

Fair Value Measurements [Abstract]

Fair value measurements by level for assets and liabilities measured at fair value on a recurring basis

The following table summarizes fair value measurements by level at March 31, 2015 for assets and liabilities measured at fair value on a recurring basis:

(In thousands)	Level I		Level II		Level III			Total
Cash equivalents	$	27,429	$	—	$	—		$	27,429
Short-term investments		37,102		—		—			37,102
Warrant liability		—		—		(7,002	)		(7,002	)

The following table summarizes fair value measurements by level at December 31, 2014 for assets and liabilities measured at fair value on a recurring basis:

(In thousands)	Level I		Level II		Level III			Total
Cash equivalents	$	31,159	$	—	$	—		$	31,159
Short-term investments		45,622		—		—			45,622
Warrant liability		—		—		(5,131	)		(5,131	)