Summary of Significant Accounting Policies (Policies)	9 Months Ended
Feb. 28, 2014
Basis of Presentation	Basis of Presentation The accompanying consolidated financial statements are unaudited and have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and reflect all adjustments, consisting solely of normal recurring adjustments, needed to fairly present the financial results for these periods. The consolidated financial statements and notes are presented as permitted by Form 10-Q. Accordingly, certain information and note disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been omitted. The accompanying consolidated financial statements should be read in conjunction with the financial statements for the fiscal years ended May 31, 2013 and 2012 and notes thereto in the Company’s Annual Report on Form 10-K for the fiscal year ended May 31, 2013, filed with the Securities and Exchange Commission on August 29, 2013. Operating results for the three and nine months ended February 28, 2014 and February 28, 2013 are not necessarily indicative of the results that may be expected for the entire year. In the opinion of management, all adjustments, consisting only of normal recurring adjustments necessary for a fair statement of (a) the results of operations for the three and nine month periods ended February 28, 2014 and February 28, 2013 and the period October 28, 2003 through February 28, 2014, (b) the financial position at February 28, 2014, and (c) cash flows for the nine month periods ended February 28, 2014 and February 28, 2013 and the period October 28, 2003 through February 28, 2014, have been made.
Principles of Consolidation	Principles of Consolidation The consolidated financial statements include the accounts of CytoDyn Inc. and its wholly owned subsidiaries, AGTI and CVM. All intercompany transactions and balances are eliminated in consolidation.
Reclassifications	Reclassifications Certain prior year amounts shown in the accompanying consolidated financial statements have been reclassified to conform to the fiscal 2014 presentation. These reclassifications did not have any effect on total current assets, total assets, total current liabilities, total liabilities, total shareholders’ equity(deficit), or net loss.
Going Concern	Going Concern The accompanying financial statements have been prepared on a going concern basis, which contemplates the realization of assets and the satisfaction of liabilities in the normal course of business. As shown in the accompanying consolidated financial statements, the Company is currently in the development stage with no revenues and with losses for all periods presented. The Company incurred a net loss of $9,435,541 for the nine months ended February 28, 2014, and has an accumulated deficit of $43,438,360. These factors, among others, raise substantial doubt about the Company’s ability to continue as a going concern. The consolidated financial statements do not include any adjustments relating to the recoverability of assets and classification of liabilities that might be necessary should the Company be unable to continue as a going concern. The Company’s continuation as a going concern is dependent upon its ability to obtain additional operating capital, complete development of one or more of its drug therapies, obtain U.S. Food & Drug Administration (“FDA”) approval, outsource manufacturing of each such approved drug therapy, and ultimately to attain profitability. The Company intends to seek additional funding through debt and equity offerings to fund its business plan. There can be no assurance, however, that the Company will be successful in these endeavors.
Use of Estimates	Use of Estimates The preparation of the consolidated financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of consolidated financial statements and the reported amounts of expenses during the reporting period. Actual results could differ from those estimates.
Cash	Cash Cash is maintained at financial institutions and, at times, balances may exceed federally insured limits. We have never experienced any losses related to these balances. All of our non-interest bearing cash balances were fully insured through December 31, 2012, due to a temporary federal program in effect from December 31, 2010 through December 31, 2012. Under the program, there was no limit to the amount of insurance for eligible accounts. Beginning 2013, insurance coverage reverted back to $250,000 per depositor at each financial institution, and our cash balances may again exceed federally insured limits. Deposit in excess of federally insured limits at February 28, 2014 and May 31, 2013 approximated $7,464,000 and $386,000 respectively.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets The Company evaluates the carrying value of long-lived assets under U.S. GAAP, which requires impairment losses to be recorded on long-lived assets used in operations when indicators of impairment are present and the undiscounted future cash flows estimated to be generated by those assets are less than the assets’ carrying amount. If such assets are impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets. Assets to be disposed of, if any, are reported at the lower of the carrying value or fair value, less costs to sell. There were no impairment charges for the three and nine months ended February 28, 2014 and February 28, 2013, and for the period October 28, 2003 through February 28, 2014.
Research and Development	Research and Development Research and development costs are expensed as incurred.
Financial Instruments	Financial Instruments At February 28, 2014 and May 31, 2013, the carrying value of the Company’s financial instruments approximates fair value due to the short-term maturity of the instruments. The Company’s notes payable have market rates of interest, and accordingly, the carrying values of the notes approximate the fair value less the applicable discount arising from the beneficial conversion feature and the value of attached warrants, as required by U.S. GAAP.
Stock-Based Compensation	Stock-Based Compensation U.S. GAAP requires companies to measure the cost of employee services received in exchange for the award of equity instruments based on the fair value of the award at the date of grant. The expense is to be recognized over the period during which an employee is required to provide services in exchange for the award (requisite service period). The Company accounts for common stock options and common stock warrants based on the fair market value of the instrument using the Black-Scholes option pricing model utilizing certain weighted average assumptions such as expected stock price volatility, term of the options and warrants, risk-free interest rates, and expected dividend yield at the grant date. The risk-free interest rate assumption is based upon observed interest rates appropriate for the expected term of the stock options. The expected volatility is based on the historical volatility of the Company’s common stock at consistent intervals. The Company has not paid any dividends on its common stock since its inception and does not anticipate paying dividends on its common stock in the foreseeable future. The computation of the expected option term is based on the “simplified method,” as the Company’s stock options are “plain vanilla” options and the Company has a limited history of exercise data. For common stock options and warrants with periodic vesting, the Company recognizes the related compensation costs associated with these options and warrants on a straight-line basis over the requisite service period. U.S. GAAP requires forfeitures to be estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. Based on limited historical experience of forfeitures, the Company estimated future unvested option forfeitures at 0% for all periods presented.
Deferred Offering Costs	Deferred Offering Costs In connection with a stock rescission liability as discussed at Note 3, the Company has recorded approximately $68,300 and $97,000 in deferred offering costs as of February 28, 2014 and May 31, 2013, respectively. These deferred offering costs have been recorded as a current asset for the respective periods. The asset will be offset against equity and reduce equity at the end of the applicable period during which the investors described in Note 3 do not assert their rescission rights and retain their shares. Conversely, if the investors assert their rescission rights and forfeit their shares, the deferred offering costs will be expensed at that time. During the nine months ended February 28, 2014, the Company incurred $120,000 in direct costs associated with the issuance of convertible notes as described at Note 4, and recorded $120,000 in amortization expense for the nine months ended February 28, 2014. During the nine months ended February 28, 2014, the Company incurred approximately $2,084,000 in direct incremental costs associated with sale of the equity securities as described in Note 6. The offering costs were recorded as a component of equity when the proceeds were received. The offering was completed on October 23, 2013.
Stock for Services	Stock for Services The Company periodically issues common stock, warrants and common stock options to consultants for various services. Costs of these transactions are measured at the fair value of the consideration received or the fair value of the equity instruments issued, whichever is more reliably measurable. The value of the common stock is measured at the earlier of (i) the date at which a firm commitment for performance by the counterparty to earn the equity instruments is reached or (ii) the date at which the counterparty’s performance is complete.
Loss Per Common Share	Loss per Common Share Basic loss per share is computed by dividing the net loss by the weighted average number of common shares outstanding during the period. Diluted loss per share is computed by dividing net loss by the weighted average common shares and potentially dilutive common share equivalents. The effects of potential common stock equivalents are not included in computations when their effect is anti-dilutive. Because of the net losses for all periods presented, the basic and diluted weighted average shares outstanding are the same since including the additional shares would have an anti-dilutive effect on the loss per share calculation. Common stock options and warrants to purchase 31,970,327 and 18,038,297 shares of common stock were not included in the computation of basic and diluted weighted average common shares outstanding for the nine months ended February 28, 2014 and February 28, 2013, respectively, as inclusion would be anti-dilutive for these periods. Additionally, as of February 28, 2014, 95,100 shares of Series B convertible preferred stock can potentially convert into 951,000 shares of common stock, and $4,521,250 of convertible debt can potentially convert into 6,028,333 shares of common stock.
Income Taxes	Income Taxes Deferred taxes are provided on the asset and liability method whereby deferred tax assets are recognized for deductible temporary differences and operating loss and tax credit carry forwards and deferred tax liabilities are recognized for taxable temporary differences. Temporary differences are the differences between the reported amounts of assets and liabilities and their tax bases. Future tax benefits for net operating loss carry forwards are recognized to the extent that realization of these benefits is considered more likely than not. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion or all of the deferred tax assets will not be realized. The Company follows the provisions of FASB ASC 740-10 “Uncertainty in Income Taxes” (ASC 740-10). A reconciliation of the beginning and ending amount of unrecognized tax benefits has not been provided since there are no unrecognized benefits for all periods presented. The Company has not recognized interest expense or penalties as a result of the implementation of ASC 740-10. If there were an unrecognized tax benefit, the Company would recognize interest accrued related to unrecognized tax benefit in interest expense and penalties in operating expenses. The Company is subject to examination by the Internal Revenue Service and state tax authorities for tax years ending after 2009.

Summary of Significant Accounting Policies (Policies)

9 Months Ended

Feb. 28, 2014

Basis of Presentation

The accompanying consolidated financial statements are unaudited and have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and reflect all adjustments, consisting solely of normal recurring adjustments, needed to fairly present the financial results for these periods. The consolidated financial statements and notes are presented as permitted by Form 10-Q. Accordingly, certain information and note disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been omitted. The accompanying consolidated financial statements should be read in conjunction with the financial statements for the fiscal years ended May 31, 2013 and 2012 and notes thereto in the Company’s Annual Report on Form 10-K for the fiscal year ended May 31, 2013, filed with the Securities and Exchange Commission on August 29, 2013. Operating results for the three and nine months ended February 28, 2014 and February 28, 2013 are not necessarily indicative of the results that may be expected for the entire year. In the opinion of management, all adjustments, consisting only of normal recurring adjustments necessary for a fair statement of (a) the results of operations for the three and nine month periods ended February 28, 2014 and February 28, 2013 and the period October 28, 2003 through February 28, 2014, (b) the financial position at February 28, 2014, and (c) cash flows for the nine month periods ended February 28, 2014 and February 28, 2013 and the period October 28, 2003 through February 28, 2014, have been made.

Principles of Consolidation

Principles of Consolidation

The consolidated financial statements include the accounts of CytoDyn Inc. and its wholly owned subsidiaries, AGTI and CVM. All intercompany transactions and balances are eliminated in consolidation.

Reclassifications

Reclassifications

Certain prior year amounts shown in the accompanying consolidated financial statements have been reclassified to conform to the fiscal 2014 presentation. These reclassifications did not have any effect on total current assets, total assets, total current liabilities, total liabilities, total shareholders’ equity(deficit), or net loss.

Going Concern

Going Concern

The accompanying financial statements have been prepared on a going concern basis, which contemplates the realization of assets and the satisfaction of liabilities in the normal course of business. As shown in the accompanying consolidated financial statements, the Company is currently in the development stage with no revenues and with losses for all periods presented. The Company incurred a net loss of $9,435,541 for the nine months ended February 28, 2014, and has an accumulated deficit of $43,438,360. These factors, among others, raise substantial doubt about the Company’s ability to continue as a going concern.

The consolidated financial statements do not include any adjustments relating to the recoverability of assets and classification of liabilities that might be necessary should the Company be unable to continue as a going concern. The Company’s continuation as a going concern is dependent upon its ability to obtain additional operating capital, complete development of one or more of its drug therapies, obtain U.S. Food & Drug Administration (“FDA”) approval, outsource manufacturing of each such approved drug therapy, and ultimately to attain profitability. The Company intends to seek additional funding through debt and equity offerings to fund its business plan. There can be no assurance, however, that the Company will be successful in these endeavors.

Use of Estimates

Use of Estimates

The preparation of the consolidated financial statements in accordance with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of consolidated financial statements and the reported amounts of expenses during the reporting period. Actual results could differ from those estimates.

Cash

Cash

Cash is maintained at financial institutions and, at times, balances may exceed federally insured limits. We have never experienced any losses related to these balances. All of our non-interest bearing cash balances were fully insured through December 31, 2012, due to a temporary federal program in effect from December 31, 2010 through December 31, 2012. Under the program, there was no limit to the amount of insurance for eligible accounts. Beginning 2013, insurance coverage reverted back to $250,000 per depositor at each financial institution, and our cash balances may again exceed federally insured limits. Deposit in excess of federally insured limits at February 28, 2014 and May 31, 2013 approximated $7,464,000 and $386,000 respectively.

Impairment of Long-Lived Assets

Impairment of Long-Lived Assets

The Company evaluates the carrying value of long-lived assets under U.S. GAAP, which requires impairment losses to be recorded on long-lived assets used in operations when indicators of impairment are present and the undiscounted future cash flows estimated to be generated by those assets are less than the assets’ carrying amount. If such assets are impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets. Assets to be disposed of, if any, are reported at the lower of the carrying value or fair value, less costs to sell. There were no impairment charges for the three and nine months ended February 28, 2014 and February 28, 2013, and for the period October 28, 2003 through February 28, 2014.

Research and Development

Research and Development

Research and development costs are expensed as incurred.

Financial Instruments

Financial Instruments

At February 28, 2014 and May 31, 2013, the carrying value of the Company’s financial instruments approximates fair value due to the short-term maturity of the instruments. The Company’s notes payable have market rates of interest, and accordingly, the carrying values of the notes approximate the fair value less the applicable discount arising from the beneficial conversion feature and the value of attached warrants, as required by U.S. GAAP.

Stock-Based Compensation

Stock-Based Compensation

U.S. GAAP requires companies to measure the cost of employee services received in exchange for the award of equity instruments based on the fair value of the award at the date of grant. The expense is to be recognized over the period during which an employee is required to provide services in exchange for the award (requisite service period).

The Company accounts for common stock options and common stock warrants based on the fair market value of the instrument using the Black-Scholes option pricing model utilizing certain weighted average assumptions such as expected stock price volatility, term of the options and warrants, risk-free interest rates, and expected dividend yield at the grant date. The risk-free interest rate assumption is based upon observed interest rates appropriate for the expected term of the stock options. The expected volatility is based on the historical volatility of the Company’s common stock at consistent intervals. The Company has not paid any dividends on its common stock since its inception and does not anticipate paying dividends on its common stock in the foreseeable future. The computation of the expected option term is based on the “simplified method,” as the Company’s stock options are “plain vanilla” options and the Company has a limited history of exercise data. For common stock options and warrants with periodic vesting, the Company recognizes the related compensation costs associated with these options and warrants on a straight-line basis over the requisite service period.

U.S. GAAP requires forfeitures to be estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. Based on limited historical experience of forfeitures, the Company estimated future unvested option forfeitures at 0% for all periods presented.

Deferred Offering Costs

Deferred Offering Costs

In connection with a stock rescission liability as discussed at Note 3, the Company has recorded approximately $68,300 and $97,000 in deferred offering costs as of February 28, 2014 and May 31, 2013, respectively. These deferred offering costs have been recorded as a current asset for the respective periods. The asset will be offset against equity and reduce equity at the end of the applicable period during which the investors described in Note 3 do not assert their rescission rights and retain their shares. Conversely, if the investors assert their rescission rights and forfeit their shares, the deferred offering costs will be expensed at that time.

During the nine months ended February 28, 2014, the Company incurred $120,000 in direct costs associated with the issuance of convertible notes as described at Note 4, and recorded $120,000 in amortization expense for the nine months ended February 28, 2014.

During the nine months ended February 28, 2014, the Company incurred approximately $2,084,000 in direct incremental costs associated with sale of the equity securities as described in Note 6. The offering costs were recorded as a component of equity when the proceeds were received. The offering was completed on October 23, 2013.

Stock for Services

Stock for Services

The Company periodically issues common stock, warrants and common stock options to consultants for various services. Costs of these transactions are measured at the fair value of the consideration received or the fair value of the equity instruments issued, whichever is more reliably measurable. The value of the common stock is measured at the earlier of (i) the date at which a firm commitment for performance by the counterparty to earn the equity instruments is reached or (ii) the date at which the counterparty’s performance is complete.

Loss Per Common Share

Loss per Common Share

Basic loss per share is computed by dividing the net loss by the weighted average number of common shares outstanding during the period. Diluted loss per share is computed by dividing net loss by the weighted average common shares and potentially dilutive common share equivalents. The effects of potential common stock equivalents are not included in computations when their effect is anti-dilutive. Because of the net losses for all periods presented, the basic and diluted weighted average shares outstanding are the same since including the additional shares would have an anti-dilutive effect on the loss per share calculation. Common stock options and warrants to purchase 31,970,327 and 18,038,297 shares of common stock were not included in the computation of basic and diluted weighted average common shares outstanding for the nine months ended February 28, 2014 and February 28, 2013, respectively, as inclusion would be anti-dilutive for these periods. Additionally, as of February 28, 2014, 95,100 shares of Series B convertible preferred stock can potentially convert into 951,000 shares of common stock, and $4,521,250 of convertible debt can potentially convert into 6,028,333 shares of common stock.

Income Taxes

Income Taxes

Deferred taxes are provided on the asset and liability method whereby deferred tax assets are recognized for deductible temporary differences and operating loss and tax credit carry forwards and deferred tax liabilities are recognized for taxable temporary differences. Temporary differences are the differences between the reported amounts of assets and liabilities and their tax bases. Future tax benefits for net operating loss carry forwards are recognized to the extent that realization of these benefits is considered more likely than not. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion or all of the deferred tax assets will not be realized.

The Company follows the provisions of FASB ASC 740-10 “Uncertainty in Income Taxes” (ASC 740-10). A reconciliation of the beginning and ending amount of unrecognized tax benefits has not been provided since there are no unrecognized benefits for all periods presented. The Company has not recognized interest expense or penalties as a result of the implementation of ASC 740-10. If there were an unrecognized tax benefit, the Company would recognize interest accrued related to unrecognized tax benefit in interest expense and penalties in operating expenses. The Company is subject to examination by the Internal Revenue Service and state tax authorities for tax years ending after 2009.