On November 30, 2017, the Company completed an offer and sale (the “Make-Whole Offering”) of an aggregate of 503,015 shares of Common Stock (the “Make-Whole Shares”) and warrants to purchase up to 251,504 shares of common stock (the “Make-Whole Warrants” and, collectively with the Make-Whole Shares, the “Make-Whole Securities”). The Make-Whole Securities issued were unregistered.

The Make-Whole Securities were offered pursuant to a form of Waiver and Subscription Agreement (the “Waiver and Subscription Agreement”). The Make-Whole Securities represented the difference in the numbers of shares of Common Stock and warrants that would have been sold to investors in the September 2017 Offering had the reduced purchase price of $0.65 per share of Common Stock and related Warrants in the October 2017 Offering, registered direct offering (as compared to $0.75 in the September 2017 Offering) and the reduced warrant exercise price of $0.75 in the October 2017 Offering (as compared to $1.00 in the September 2017 Offering) applied to the September 2017 Offering as well. The Make-Whole Securities were offered as consideration for the release of potential claims by participating investors. In connection with these arrangements, the exercise prices of any warrants previously sold in the September 2017 Offering to participating investors has also been reduced to $0.75 from $1.00. In addition, warrants previously issued to the placement agent (or its designees) in respect of participating investors have also been proportionately adjusted to reflect a reduced exercise price of $0.715 (as compared to $0.825 in the September 2017 Offering) and 26,702 additional shares.

In connection with an November 24, 2017 Offer to amend and exercise certain eligible warrants at a reduced exercise price of $0.50 per share of common stock, on March 23, 2018, the Company issued 2,470,585 shares of common stock to warrant holders who participated in the Offer, in exchange for their eligible warrants, in a private securities offering.

During the year ended May 31, 2018, the Company conducted a private equity offering, in which accredited investors purchased unregistered common stock at $0.50 per share with warrant coverage ratio of 100%, based on the number of shares of common stock purchased. Pursuant to the offering, the Company sold a total of 35,286,904 shares of common stock for aggregate gross proceeds of $17.6 million and issued warrants covering an aggregate of 35,286,904 shares of common stock with a five-year term and an exercise price of $0.75 per share. In connection with the offering, the placement agent received a warrant covering 2,813,491 shares of common stock, with a five-year term, an exercise price of $0.55 per share, and including a cashless exercise provision.

During the year ended May 31, 2019, the Company conducted private equity offerings (the “Equity Offerings”), in which accredited investors purchased unregistered common stock at $0.50 per share with warrant coverage of 50% based on the number of shares of common stock purchased. Pursuant to the Equity Offerings, the Company sold a total of 46,975,170 shares of common stock, $0.001 par value, for aggregate gross proceeds of approximately $23.5 million and issued five-year warrants covering 23,487,585 shares of common stock, with an exercise price of $.75 per share. In conjunction with the Equity Offerings, the Company paid an aggregate cash fee of approximately $2.7 million to the placement agent and issued warrants covering an aggregate of 4,446,917 shares of common stock to the placement agent as additional compensation.

non-cash

On December 20, 2019, the Company entered into a private warrant exchange in which certain accredited investors purchased unregistered common stock at a range of $0.22 to $0.25 per share as compared to the stated exercise price ranging from 0.45 to $0.75 per share of common stock. The Company sold 3,350,000 shares of common stock, as well as 1,340,000 additional shares as an inducement to exercise their warrants, for a total of 4,690,000 shares of common stock, $0.001 par value. Aggregate gross proceeds from the private warrant exchange were approximately $0.8 million.

On December 30, 2019, the Company entered into a private warrant exchange in which certain accredited investors purchased unregistered common stock at a reduced exercise price per share of $0.50 for any warrant with a stated exercise price greater than $0.50 per share and no discount for warrants with a stated exercise price equal to or less than $0.50 per share. The Company sold 2,230,000 shares of common stock, as well as 446,000 additional shares as an inducement to exercise their warrants, for a total of 2,676,000 shares of common stock, $0.001 par value. Aggregate gross proceeds from the private warrant exchange were approximately $1.1 million.

During January 2020, the Company entered into a private warrant exchange in which certain accredited investors purchased unregistered common stock at a reduced exercise price per share of $0.50 for any warrant with a stated exercise price greater than $0.50 per share and no discount for warrants with a stated exercise price equal to or less than $0.50 per share. The Company issued 4,040,000 shares of common stock, as well as 408,000 additional shares as an inducement to exercise their warrants, for a total of 4,448,000 shares of common stock, $0.001 par value. Aggregate gross proceeds from the private warrant exchange were approximately $1.9 million.

From February 28, 2020, the Company entered into a private warrant exchange in which certain accredited investors purchased common stock at a range of $0.18 to $0.45 per share as compared to the stated exercise price on their warrant, which ranged from $0.30 to $0.75 per share of common stock. The Company issued 7,842,500 shares of common stock, as well as 784,245 additional shares as an inducement to exercise their warrants, for a total of 8,626,745 shares of common stock, $0.001 par value. Aggregate gross proceeds from the private warrant exchange were approximately $2.2 million.

On March 4, 2020, the Completed a private warrant exchange in which an accredited investor purchased Common Stock at a price of $0.45 per share as compared to the stated exercise price of $0.75. The Company issued 80,000 shares of Common Stock, as well as 8,000 additional shares as an inducement to exercise their warrants, for a total of 88,000 shares of common stock, $0.001 par value, resulting in gross proceeds of approximately $36,000.

non-cash