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Note 9. Stockholders' Equity (Deficiency)

Common Stock

On June 8, 2015, in exchange for the termination of a consulting agreement with a Director, the Company issued 300,000 restricted stock units (with the value of $50,400 based on the market value on the grant date). Two-thirds are fully vested and the remaining balance vests in six equal monthly installments commencing on June 30, 2015. At July 31, 2015, 233,333 shares were vested and the Company recorded an expense of $39,144.

Warrants

A summary of the Company's warrant activity during the three months ended July 31, 2015 is presented below:

Certain of the Company's warrants contain price protection. The Company evaluated whether the price protection provision of the warrant would cause derivative treatment. In its assessment, the Company determined that since its shares are not readily convertible to cash due to an inactive trading market, through April 30, 2015 the warrants are excluded from derivative treatment.

Stock Incentive Plan and Stock Option Grants to Employees and Directors

Immediately following the closing of the Reverse Merger, on March 13, 2012, the Company adopted the 2012 Equity Incentive Plan (the “Plan”) that provides for the grant of 9,300,000 shares, 14,300,000 effective July 2014 and 16,300,000 effective September 2014, in the form of incentive stock options, non-qualified stock options, restricted shares, stock appreciation rights and restricted stock units to employees, consultants, officers and directors. As of July 31, 2015, there were 927,687 shares remaining under the Plan for future issuance.

The Company estimates the fair value of share-based compensation utilizing the Black-Scholes option pricing model, which is dependent upon several variables such as the expected option term, expected volatility of the Company's stock price over the expected term, expected risk-free interest rate over the expected option term, expected dividend yield rate over the expected option term, and an estimate of expected forfeiture rates. The Company believes this valuation methodology is appropriate for estimating the fair value of stock options granted to employees and directors which are subject to ASC Topic 718 requirements. These amounts are estimates and thus may not be reflective of actual future results, nor amounts ultimately realized by recipients of these grants. The Company recognizes compensation on a straight-line basis over the requisite service period for each award.

A summary of the Company's stock option activity for employees and directors during the three months ended July 31, 2015 is presented below:

On June 8, 2015, the Chief Academic Officer received a grant of 1,000,000 options which has a fair value of $60,000, the Chief Operating Officer received a grant of 700,000 options which has a fair value of $42,000 and the Chief Financial Officer received a grant of 300,000 options which has a fair value of $18,000. All of these options have an exercise price of $0.168 per share.

As of July 31, 2015, there was approximately $519,412 of unrecognized compensation costs related to nonvested share-based compensation arrangements. That cost is expected to be recognized over a weighted-average period of 3.2 years.

The Company recorded compensation expense of $72,941 for the 3 months ended July 31, 2015 in connection with employee stock options. The Company recorded compensation expense of $97,203 for the three months ended July 31, 2014 in connection with employee stock options.

Stock Option Grants to Non-Employees

There were no stock options granted to non-employees during the three months ended July 31, 2015. The Company recorded no compensation expense for the three months ended July 31, 2015 in connection with non-employee stock options.

There was no unrecognized compensation cost at July 31, 2015.

A summary of the Company's stock option activity for non-employees during the three months ended July 31, 2015 is presented below: