Part 1 -- FINANCIAL INFORMATION

Item 1     Financial Statements

GEOVAX LABS, INC.

(A DEVELOPMENT-STAGE ENTERPRISE)

CONDENSED CONSOLIDATED BALANCE SHEETS

See accompanying notes to condensed consolidated financial statements.

 GEOVAX LABS, INC.

(A DEVELOPMENT-STAGE ENTERPRISE)

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(Unaudited)

See accompanying notes to condensed consolidated financial statements.

GEOVAX LABS, INC.

(A DEVELOPMENT STAGE ENTERPRISE)

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

Supplement disclosure of non-cash investing and financing activities:

As discussed in Note 6, during the three months ended March 31, 2014, an aggregate of 71 shares of Series A Convertible Preferred Stock were converted into 202,857 shares of common stock, and an aggregate of 350 shares of Series B Convertible Preferred Stock were converted into 1,000,000 shares of common stock.    

See accompanying notes to condensed consolidated financial statements.

GEOVAX LABS, INC.

(A DEVELOPMENT-STAGE ENTERPRISE)

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

March 31, 2014

(unaudited)

1.     Description of Company and Basis of Presentation

GeoVax Labs, Inc. (“GeoVax” or the “Company”), is a biotechnology company developing vaccines that prevent and fight Human Immunodeficiency Virus (“HIV”) infections. HIV infections result in Acquired Immunodeficiency Syndrome (“AIDS”). We have exclusively licensed from Emory University (“Emory”) vaccine technology which was developed in collaboration with the National Institutes of Health (“NIH”) and the Centers for Disease Control and Prevention (“CDC”). GeoVax is incorporated under the laws of the State of Delaware and our principal offices are located in Smyrna, Georgia (metropolitan Atlanta area).

Our most advanced vaccines under development address the clade B subtype of the HIV virus that is most prevalent in the United States and western Europe. Our vaccines are being evaluated to determine their potential to (a) prevent HIV infection and (b) to serve as a therapy for individuals who are already infected with HIV. These vaccines are currently being evaluated in humans -- both in those infected with HIV and those who are not. Our goal is to build a profitable company by generating income from products we develop and commercialize, either alone or with one or more potential strategic partners.

We are devoting substantially all of our present efforts to research and development and GeoVax is a development stage enterprise as defined by Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 915, Development Stage Entities. We have funded our activities to date from government grants and clinical trial assistance, and from sales of our equity securities. We will continue to require substantial funds to continue these activities. We believe that our existing cash resources, combined with the proceeds from the NIH grants discussed in Note 8, will be sufficient to fund our planned operations into the first quarter of 2015. We expect we will need to raise additional funds and are currently exploring sources of non-dilutive capital through government grant programs and clinical trial support. We also intend to conduct additional offerings of our equity securities or convertible debt instruments. However, additional funding may not be available on favorable terms or at all. If we fail to obtain additional capital when needed, we may be required to delay, scale back, or eliminate some or all of our research and development programs as well as reduce our general and administrative expenses.

The accompanying condensed consolidated financial statements at March 31, 2014 and for the three month periods ended March 31, 2014 and 2013 are unaudited, but include all adjustments, consisting of normal recurring entries, which we believe to be necessary for a fair presentation of the dates and periods presented. Interim results are not necessarily indicative of results for a full year. The financial statements should be read in conjunction with our audited financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2013. We expect our operating results to fluctuate for the foreseeable future; therefore, period-to-period comparisons should not be relied upon as predictive of the results in future periods.

We disclosed in Note 2 to our financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2013 those accounting policies that we consider significant in determining our results of operations and financial position. There have been no material changes to, or in the application of, the accounting policies previously identified and described in the Form 10-K.

2.     Recent Accounting Pronouncements

There have been no recent accounting pronouncements or changes in accounting pronouncements during the three months ended March 31, 2014, as compared to the recent accounting pronouncements described in our Annual Report on Form 10-K for the fiscal year ended December 31, 2013, which we expect to have a material impact on our financial statements.

3.     Basic and Diluted Loss Per Common Share

Basic net loss per share is computed using the weighted-average number of common shares outstanding during the period. Diluted net loss per share is computed using the weighted-average number of common shares and potentially dilutive common share equivalents outstanding during the period. Potentially dilutive common share equivalents consist of convertible preferred stock, stock options and stock purchase warrants. Common share equivalents which potentially could dilute basic earnings per share in the future, and which were excluded from the computation of diluted loss per share, as the effect would be anti-dilutive, totaled approximately 13.0 million and 11.6 million shares at March 31, 2014 and 2013, respectively.

4.     Balance Sheet Components

The tables below provide a breakdown of certain line items on the accompanying condensed consolidated balance sheets.

5.     Commitments

Lease Agreement

We lease approximately 8,400 square feet of office and laboratory space located in Smyrna, Georgia (metropolitan Atlanta). As of March 31, 2014, our future minimum lease payments pursuant to the 62 month operating lease total $96,850 for the remainder of 2014.

Other Commitments

In the normal course of business, we may enter into various firm purchase commitments related to production and testing of our vaccine material, conduct of our clinical trials, and other research-related activities. As of March 31, 2014, we had approximately $54,700 of unrecorded outstanding purchase commitments to our vendors and subcontractors, all of which we expect will be due in 2014.

6.     Stockholders’ Equity

Preferred Stock Transactions

During the three months ended March 31, 2014 we issued an aggregate of 202,857 and 1,000,000 shares of our common stock related to conversions of our Series A and Series B Convertible Preferred Stock, respectively. As of March 31, 2014, there are no shares of our Series A Convertible Preferred Stock outstanding, and 1,300 shares of our Series B Convertible Preferred Stock outstanding, convertible into 3,714,286 shares of our common stock.

Common Stock Transactions

Other than common stock issued pursuant to the conversion of our Series A and Series B Convertible Preferred Stock described above, we issued no shares of our common stock during the three months ended March 31, 2014.

Stock Options

We maintain a stock option plan that provides the Board of Directors broad discretion in creating equity incentives for employees, officers, directors and consultants. The following table presents a summary of stock option transactions during the three months ended March 31, 2014:

Stock Purchase Warrants

We have issued stock purchase warrants in connection with financing transactions and also in exchange for services from consultants and others. As of March 31, 2014, there are 8,284,826 stock purchase warrants outstanding, with a weighted average exercise price of $2.07.

Stock-Based Compensation Expense

During the three month period ended March 31, 2014, we recorded share-based compensation expense related to stock options of $26,307, as compared to $47,274 for the three month period ended March 31, 2013. Share-based compensation expense is recognized on a straight-line basis over the requisite service period for the award and is allocated to research and development expense or general and administrative expense based upon the related employee classification. As of March 31, 2014, there was $161,711 of unrecognized compensation expense related to stock options, which is expected to be recognized over a weighted average period of 2 years.

During the three month period ended March 31, 2013, we recorded an aggregate of $218,551 of general and administrative expense associated with certain modifications to then-outstanding stock purchase warrants.

Common Stock Reserved

A summary of our common stock reserved for future issuance is as follows as of March 31, 2014:

7.     Income Taxes

Because of our historically significant net operating losses, we have not paid income taxes since inception. We maintain deferred tax assets that reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. These deferred tax assets are comprised primarily of net operating loss carryforwards and also include amounts relating to nonqualified stock options and research and development credits. The net deferred tax asset has been fully offset by a valuation allowance because of the uncertainty of our future profitability and our ability to utilize the deferred tax assets. Utilization of operating losses and credits may be subject to substantial annual limitations due to ownership change provisions of Section 382 of the Internal Revenue Code. The annual limitation may result in the expiration of net operating losses and credits before utilization.

8.     Government Grants

In September 2007, the NIH awarded us an Integrated Preclinical/Clinical AIDS Vaccine Development (IPCAVD) grant to support our HIV/AIDS vaccine program. We are utilizing this funding to further our HIV/AIDS vaccine development, optimization and production. The aggregate award (including subsequent amendments) totaled approximately $20.4 million and, as of March 31, 2014, there is $596,801 of unrecognized grant funds remaining and available for use through the end of the grant period (August 31, 2014).

In July 2013, the NIH awarded us a Small Business Innovative Research (SBIR) grant entitled “Enhancing Protective Antibody Responses for a GM-CSF Adjuvanted HIV Vaccine.” The grant award of approximately $277,000 is for the first year of a two year project period beginning August 1, 2013 and, as of March 31, 2014, there is $68,139 of unrecognized grant funds remaining and available for use through the end of the grant period (July 31, 2014).

We record revenue associated with these grants as the related costs and expenses are incurred and such revenue is reported as a separate line item in our statements of operations. During the three months ended March 31, 2014 and 2013, we recorded $157,340, and $797,040, respectively, of revenue associated with these grants.

9.     Related Party Transactions

We are obligated to reimburse Emory University (a significant stockholder of the Company) for certain prior and ongoing costs in connection with the filing, prosecution and maintenance of patent applications subject to our technology license agreement from Emory. During the three month period ended March 31, 2014, we recorded $43,919 of general and administrative expense associated with these patent cost reimbursements to Emory.

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

FORWARD LOOKING STATEMENTS

In addition to historical information, the information included in this Form 10-Q contains forward-looking statements. Forward-looking statements involve numerous risks and uncertainties, including but not limited to the risk factors set forth under the heading “Risk Factors” in the Annual Report on Form 10-K for the year ended December 31, 2013, and should not be relied upon as predictions of future events. Certain such forward-looking statements can be identified by the use of forward-looking terminology such as ““believes,’’ ““expects,’’ ““may,’’ ““will,’’ ““should,’’ ““seeks,’’ ““approximately,” ““intends,’’ ““plans,’’ ““pro forma,’’ ““estimates,’’ or ““anticipates’’ or other variations thereof or comparable terminology, or by discussions of strategy, plans or intentions. Such forward-looking statements are necessarily dependent on assumptions, data or methods that may be incorrect or imprecise and may be incapable of being realized. The following factors, among others, could cause actual results and future events to differ materially from those set forth or contemplated in the forward-looking statements:

Readers are cautioned not to place undue reliance on forward-looking statements, which reflect our management’s analysis only. We assume no obligation to update forward-looking statements.

Overview

GeoVax is a biotechnology company developing vaccines that prevent and control HIV. Our vaccine technology was developed in collaboration with researchers at Emory University, the NIH, and the CDC. The technology developed by the collaboration is exclusively licensed to us from Emory University. We also have nonexclusive licenses to certain patents owned by the NIH.

Our current vaccines under development address the clade B subtype of the HIV virus that is most prevalent in the United States and much of the developed world. Our vaccines are being evaluated to determine their potential to (a) prevent HIV infection and (b) to serve as a treatment for individuals who are already infected with HIV. These vaccines are currently being evaluated in human clinical trials -- both in those infected with HIV and those who are not.

We have neither received regulatory approval for any of our vaccine candidates, nor do we have any commercialization capabilities; therefore, it is possible that we may never successfully derive significant product revenues from any of our existing or future development programs or product candidates.

We expect for the foreseeable future our operations will result in a net loss on a quarterly and annual basis. As of March 31, 2014, we had an accumulated deficit of approximately $27.7 million.

Critical Accounting Policies and Estimates

This discussion and analysis of our financial condition and results of operations is based on the accompanying unaudited condensed consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States. The preparation of these financial statements requires management to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses and related disclosure of contingent assets and liabilities. On an ongoing basis, management evaluates its estimates and adjusts the estimates as necessary. 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 consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2013. We believe the following critical accounting policies affect our more significant judgments and estimates used in the preparation of our consolidated financial statements:

Revenue Recognition

We recognize revenue in accordance with the SEC’s Staff Accounting Bulletin No. 101, Revenue Recognition in Financial Statements, as amended by Staff Accounting Bulletin No. 104, Revenue Recognition (SAB 104). SAB 104 provides guidance in applying U.S. generally accepted accounting principles to revenue recognition issues, and specifically addresses revenue recognition for upfront, non-refundable fees received in connection with research collaboration agreements. Our revenue consists solely of grant funding received from the NIH. Revenue from this arrangement is approximately equal to the costs incurred and is recorded as income as the related costs are incurred.

Stock-Based Compensation

We account for stock-based transactions in which the Company receives services from employees, directors or others in exchange for equity instruments based on the fair value of the award at the grant date. Compensation cost for awards of common stock is estimated based on the price of the underlying common stock on the date of issuance. Compensation cost for stock options or warrants is estimated at the grant date based on each instrument’s fair-value as calculated by the Black-Scholes option pricing model. We recognize stock-based compensation cost as expense ratably on a straight-line basis over the requisite service period for the award.

Liquidity and Capital Resources

At March 31, 2014, we had cash and cash equivalents of $2,010,326 and total assets of $2,172,959, as compared to $2,513,861 and $2,839,576, respectively, at December 31, 2013. Working capital totaled $1,812,751 at March 31, 2014, compared to $2,385,990 at December 31, 2013.

Sources and Uses of Cash

We are a development-stage company as defined by Financial Accounting Standards Board (FASB), Accounting Standards Codification (ASC), Topic 915, Development Stage Entities, and do not have any products approved for sale. Due to our significant research and development expenditures, we have not been profitable and have generated operating losses since our inception in 2001. Our primary sources of cash are from sales of our equity securities and from government grant funding and clinical trial assistance.

Cash Flows from Operating Activities

Net cash used in operating activities was $503,535 for the three month period ended March 31, 2014 as compared to $344,489 for the comparable period in 2013. Generally, the differences between periods are due to fluctuations in our net losses, offset by non-cash charges such as depreciation and stock-based compensation expense, and by net changes in our assets and liabilities. Our net losses generally fluctuate based on expenditures for our research activities, offset by government grant revenues.

The NIH has funded the costs of conducting all of our human clinical trials (Phase 1 and Phase 2a) to date for our preventive vaccines, with GeoVax incurring costs associated with manufacturing the clinical vaccine supplies and other study support. We are currently in planning discussions with the HVTN for the next stage of our preventive clinical trials, and several scenarios are being considered. We expect the next clinical trial to begin during 2015 and to be fully funded by the NIH, with specific details of the study determined after further data analysis and input from the HVTN and NIH in mid-2014. Until the next trial begins, however, we cannot be fully assured of the level of support, if any, we will receive from the HVTN or the NIH for this clinical trial.

We recently completed a Phase 1 clinical trial (GV-TH-01) investigating the therapeutic use of our GOVX-B11 vaccine in HIV-infected patients. GV-TH-01 is an open label Phase 1 treatment interruption trial investigating the safety and immunogenicity of GOVX-B11 in 9 HIV-infected patients who initiated drug treatment within 18 months of seroconversion and had stably controlled virus for at least 6 months. An exploratory objective of the study is to evaluate the ability of the vaccinated patient to control re-emergent virus during the drug treatment interruption period. We received no federal assistance in conducting this study. In a follow-on study, we are formulating plans for an additional Phase 1 clinical trial investigating the treatment of HIV-positive individuals with the adjuvanted version of our vaccine (GOVX-B21) in combination with standard-of-care antiretroviral drug therapy. The primary and secondary objectives of the study will be to evaluate the safety and immunogenicity of our vaccine. An exploratory objective will be to investigate the vaccine’s effect on reducing viral reservoirs. Initiation of this trial, which we expect will cost between $2-3 million, will be dependent upon our ability to secure the required funding. We plan to seek funding from the NIH to conduct this trial, but we will also consider obtaining funds from issuance of our equity securities or other sources.

In addition to clinical trial support from the NIH, our operations are partially funded by NIH research grants. We record the funding we receive pursuant to these grants as revenue at the time the related expenditures are incurred. In September 2007, the NIH awarded us an Integrated Preclinical/Clinical AIDS Vaccine Development (IPCAVD) grant to support our HIV/AIDS vaccine program. We are utilizing this funding to further our HIV/AIDS vaccine development, optimization and production. The aggregate award (including subsequent amendments) totaled approximately $20.4 million, and there is $596,801 remaining and available for use as of March 31, 2014. In July 2013, the NIH awarded us a Small Business Innovative Research (SBIR) grant to support preclinical studies evaluating the ability of protein boosts to augment antibody responses. The grant award of approximately $277,000 is for the first year of a two year project period beginning August 1, 2013, and there is $68,139 remaining and available for use as of March 31, 2014.

We intend to pursue additional grants from the federal government but cannot be assured of success. As we progress to the later stages of our vaccine development activities, government financial support may be more difficult to obtain, or may not be available at all. Therefore, it will be necessary for us to look to other sources of funding in order to finance our clinical trials and other vaccine development activities.

Cash Flows from Investing Activities

Our investing activities have consisted predominantly of capital expenditures. There were no capital expenditures during the three months ended March 31, 2014 or for the comparable period in 2013.

Cash Flows from Financing Activities

Net cash provided by financing activities was $-0- for the three month period ended March 31, 2014, as compared to $1,060,000 for the comparable period in 2013. The cash generated by our financing activities during the three month period ended March 31, 2013 relates to the exercise of certain stock purchase warrants.

Our capital requirements, particularly as they relate to our research and development activities, have been and will continue to be significant. We anticipate incurring additional losses for several years as we expand our clinical programs and proceed into higher cost human clinical trials. Conducting clinical trials for our vaccine candidates in development is a lengthy, time-consuming and expensive process. We will not generate revenues from the sale of our technology or products for at least several years, if at all. For the foreseeable future, we will be dependent on obtaining financing from third parties in order to maintain our operations, including our clinical program. Such capital may not be available on terms acceptable to the Company or at all. If we fail to obtain additional funding when needed, we would be forced to scale back or terminate our operations, or to seek to merge with or to be acquired by another company.

We expect that our current working capital combined with the remaining available funds from the NIH grants will be sufficient to support our planned level of operations into the first quarter of 2015. We anticipate raising additional capital during 2014, although there can be no assurance that we will be able to do so. While we believe that we will be successful in obtaining the necessary financing to fund our operations through government grants and clinical trial support, exercise of stock purchase warrants, and/or other sources, there can be no assurances that such additional funding will be available to us on reasonable terms or at all. Should the financing we require to sustain our working capital needs be unavailable or prohibitively expensive when we require it, the consequences could have a material adverse effect on our business, operating results, financial condition and prospects.

We have no off-balance sheet arrangements that are likely or reasonably likely to have a material effect on our financial condition or results of operations.

Contractual Obligations

As of March 31, 2014, we had noncancellable lease obligations and other firm purchase obligations totalling approximately $151,500, as compared to approximately $206,000 at December 31, 2013. We have no committed lines of credit and no other committed funding or long-term debt. We have employment agreements with our senior management team, each of which may be terminated with 30 days advance notice. There have been no other material changes to the table presented in our Annual Report on Form 10-K for the year ended December 31, 2013.

Results of Operations

Net Loss

We recorded a net loss of $615,918 for the three months ended March 31, 2014, as compared to $696,797 for the three months ended March 31, 2013. Our net losses will typically fluctuate due to the timing of activities and related costs associated with our vaccine research and development activities and our general and administrative costs, as described in more detail below.

Grant Revenue

During the three months ended March 31, 2014, we recorded grant revenue of $157,340, as compared to $797,040 during the comparable period of 2013. Grant revenues relate to grants from the NIH in support of our HIV vaccine development activities (see discussion under “Liquidity and Capital Resources” above). We record revenue associated with these grants as the related costs and expenses are incurred. The difference in our grant revenues from period to period is directly related to our expenditures for activities supported by the grants, and can fluctuate significantly based on the timing of the related expenditures. There is an aggregate of approximately $665,000 in approved grant funds remaining and available for use as of March 31, 2014, which we anticipate recognizing as revenue during the remainder of 2014.

Research and Development

During the three months ended March 31, 2014, we recorded $402,860 of research and development expense, as compared to $881,988 during the three months ended March 31, 2013. Research and development expense for these periods includes stock-based compensation expense of $9,138 and $12,063 for the 2014 and 2013 periods, respectively (see discussion under “Stock-Based Compensation Expense” below).

Our research and development expenses can fluctuate considerably on a period-to-period basis. The overall decrease in research and development expense during the three months ended March 31, 2014, as compared to the 2013 period, can mostly be attributed to lower expenditures related to our grants from the NIH, and lower expenditures associated with the conduct of a Phase 1 trial of our therapeutic HIV vaccine, which was completed during the first quarter of 2014. We have not received any government support for clinical trials of our therapeutic vaccine. Our research and development costs do not include costs incurred by the HVTN in conducting clinical trials of our preventive HIV vaccines; those costs are funded directly by the NIH.

We cannot predict the level of support we may receive from HVTN or other federal agencies (or divisions thereof) for our future clinical trials. We expect that our research and development costs will increase in the future as we progress into the later stage human clinical trials.

Our vaccine candidates still require significant, time-consuming and costly research and development, testing and regulatory clearances. Completion of clinical development will take several years or more, but the length of time generally varies substantially according to the type, complexity, novelty and intended use of a product candidate. The NIH has funded the costs of conducting all of our completed and ongoing human clinical trials to date for our preventive HIV vaccine, with GeoVax incurring costs associated with manufacturing the clinical vaccine supplies and other study support. We are having discussions with the HVTN and NIH with regard to the conduct of an additional trial of our preventive vaccine, and we expect the NIH will provide support for this trial as well. We intend to seek government and/or third party support for future clinical human trials, but there can be no assurance that we will be successful.

The duration and the cost of future clinical trials may vary significantly over the life of the project as a result of differences arising during development of the human clinical trial protocols, including, among others:

Due to the uncertainty regarding the timing and regulatory approval of clinical trials and pre-clinical studies, our future expenditures are likely to be highly volatile in future periods depending on the outcomes of the trials and studies. From time to time, we will make determinations as to how much funding to direct to these programs in response to their scientific, clinical and regulatory success, anticipated market opportunity and the availability of capital to fund our programs.

In developing our product candidates, we are subject to a number of risks that are inherent in the development of products based on innovative technologies. For example, it is possible that our vaccines may be ineffective or toxic, or will otherwise fail to receive the necessary regulatory clearances, causing us to delay, extend or terminate our product development efforts. Any failure by us to obtain, or any delay in obtaining, regulatory approvals could cause our research and development expenditures to increase which, in turn, could have a material adverse effect on our results of operations and cash flows. Because of the uncertainties of clinical trials, estimating the completion dates or cost to complete our research and development programs is highly speculative and subjective. As a result of these factors, we are unable to accurately estimate the nature, timing and future costs necessary to complete the development of our product candidates. In addition, we are unable to reasonably estimate the period when material net cash inflows could commence from the sale, licensing or commercialization of such product candidates, if ever.

General and Administrative Expense

Our general and administrative expenses were $371,802 during the three months ended March 31, 2014, as compared to $612,943 during the three months ended March 31, 2013. General and administrative costs include officers’ salaries, legal and accounting costs, patent costs, amortization expense associated with intangible assets, and other general corporate expenses. General and administrative expense includes stock-based compensation expense of $17,169 and $253,762 for the three months ended March 31, 2014 and 2013, respectively (see discussion under “Stock-Based Compensation Expense” below). Excluding stock-based compensation expense, general and administrative expenses were $354,633 during the three months ended March 31, 2014, as compared to $359,181 during the three months ended March 31, 2013. We expect that our general and administrative costs may increase in the future in support of expanded research and development activities and other general corporate activities.

Stock-Based Compensation Expense

We recorded stock-based compensation expense of $26,307 and $265,825 during the three months ended March 31, 2014 and 2013, respectively, which was allocated to research and development expense or general and administrative expense according to the classification of cash compensation paid to the employee, consultant or director to whom the stock compensation was granted. In addition to amounts related to the issuance of stock options to employees, the figures include amounts related to common stock and stock purchase warrants issued to consultants and others. The overall decrease in stock-based compensation expense during the 2014 period, as compared to 2013, can be attributed to $218,551 of expense recorded in the 2013 period associated with the repricing and extension of certain stock purchase warrants held by investors from a prior financing round in exchange for exercise of a portion of those warrants by the investors. For the three months ended March 31, 2014 and 2013, stock-based compensation expense was allocated as follows:

Other Income

Interest income for the three months ended March 31, 2014 and 2013 was $1,404 and $1.094, respectively. The variances between periods are primarily attributable to cash available for investment and interest rate fluctuations.

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 United States interest rates, particularly because a significant portion of our investments are in institutional money market funds. The primary objective of our investment activities is to preserve principal while at the same time maximizing the income received without significantly increasing risk. Due to the nature of our short-term investments, we believe that we are not subject to any material market risk exposure.

Item 4     Controls and Procedures

Evaluation of disclosure controls and procedures

Disclosure controls and procedures are controls and other procedures that are designed to ensure that the information required to be disclosed in reports filed or submitted under the Securities Exchange Act of 1934, as amended (Exchange Act), is (1) recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms and (2) accumulated and communicated to management, including the Chief Executive Officer and Principal Financial and Accounting Officer, as appropriate to allow timely decisions regarding required disclosure.

Our management has carried out an evaluation, under the supervision and with the participation of our Principal Executive Officer and our Principal Financial and Accounting Officer, of the effectiveness of the design and operation of our disclosure controls and procedures pursuant to Exchange Act Rules 13a-15 and 15d-15 as of the end of the period covered by this report. Based on that evaluation, our Chief Executive Officer and Chief Financial Officer have concluded that, as of the end of the period covered by this report, our disclosure controls and procedures are effective to ensure that information required to be disclosed by us in the reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms.

Changes in internal control over financial reporting

There was no change in our internal control over financial reporting that occurred during the three months ended March 31, 2014 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

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