Note 6. Private Placements of Common Stock and Warrants

Approval of increase in authorized common stock

On November 9, 2023, at the Company’s annual stockholders’ meeting, the Company’s stockholders approved a proposal to increase the total number of authorized shares of common stock from 1.35 billion shares to 1.75 billion shares.

Liability classified warrants

From June 24, 2022 through August 31, 2022, the Company had insufficient authorized common stock to reserve for the shares underlying the Surety Backstop warrants and warrants issued to a placement agent in connection with the June 2022 offering. After approval by the Company’s stockholders of an increase to the Company’s authorized common stock, on August 31, 2022, sufficient shares were authorized to cover the shares underlying the warrants. Given that the Company did not have a sufficient number of authorized shares for the instruments at the time they were issued, the Company accounted for such warrants issued from June 24, 2022 through August 2022 as liability classified warrants consistent with ASC 815, Derivatives and Hedging.

On December 1, 2022, the Company entered into the second amendment of the Surety Bond Backstop Agreement which included the issuance of a warrant covering up to 7.5 million shares of common stock with an exercise price of $0.10 per share, with the ultimate number of shares to be covered by the second warrant to be calculated based on a formula relating to how quickly the Company relieved the balance of cash collateral pledged by the Indemnitors. On February 28, 2023, the warrant was determined to cover 7.5 million shares of common stock. As the settlement amount of shares of common stock underlying the warrant was variable, the Company accounted for such warrant as a liability classified warrant consistent with ASC 815, Derivatives and Hedging, until the number of shares underlying the warrant was determined, at which point the warrant became equity classified.

During April and May 2023, the Company sold Placement Agent Notes through a placement agent. See Note 5, Convertible Instruments and Accrued Interest – Placement Agent Notes. The Company agreed to issue warrants to the placement agent as part of the issuance costs with an exercise price that was not determined until the final closing date. As the exercise price of the warrants was to be fixed based on the final terms of the offering, the Company accounted for the warrants as a liability-classified warrant beginning on the initial closing date until the final closing date. The value of the warrants on May 31, 2023, was recorded as a derivative liability on the balance sheet, and the change in the fair value of the warrants was recorded as a gain or loss on derivatives. On June 23, 2023, the final closing of the Placement Agent Notes occurred, and the fair value of the warrants became equity classified.

On July 31, 2023, the Placement Agent Notes were converted into units that had similar terms to units being offered in a private placement of shares and warrants through a placement agent that commenced in July 2023. See Private placement of common stock and warrants through placement agent below. As the unit price was not determinable until the final closing date of the subsequent private placement, the units related to the conversion of the Placement Agent Notes were recorded as a liability and at fair value. On October 23, 2023, the private placement was concluded, which finalized the unit purchase price at $0.16, and the fair value of the units became equity-classified.

During November 2023, in connection with the issuance of the Short-term Notes described in Note 5, Convertible Instruments and Accrued Interest – Short-term Notes, the Company agreed to issue warrants to the placement agent as part of the issuance costs, with the ultimate number of warrants and exercise price to be determined as of the final closing date. The value of the warrants was recorded as a derivative liability on the balance sheet until the final closing date in December 2023, and the change in the fair value of the warrants was recorded as a gain or loss on derivatives.

On December 29, 2023, the Short-term Notes were converted into units that had similar terms to units being offered in a private placement of shares and warrants through a placement agent. See Private placement of common stock and warrants through placement agent below. As the unit price was not determinable until the final closing date of the subsequent private placement, the units related to the conversion of the Placement Agent Notes were recorded as a liability and at fair value. The change in the fair value of the units was recorded as a gain or loss on derivatives. On May 3, 2024, the private placement was concluded, which finalized the unit purchase price at $0.10, and the fair value of the units became equity-classified.

In accordance with the prescribed accounting guidance, the Company measured fair value of liability classified warrants using fair value hierarchy included in Note 2, Summary of Significant Accounting Policies – Fair Value of Financial Instruments.

As of May 31, 2024, in accordance with ASC 815, Derivatives and Hedging, the Company reclassified warrants to equity when the warrants no longer qualified as liabilities. The Company recorded a loss on derivatives of approximately $0.2 million and $8.8 million in the fiscal years ended May 31, 2024 and 2023, respectively, due to a change in fair market value of the liability classified

shares of common stock and warrants. The table below presents a reconciliation of the beginning and ending balances for liabilities measured at fair value as of May 31, 2022, and during the fiscal years ended May 31, 2023 and 2024:

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The Company used a Black-Scholes valuation model to estimate the value of the liability classified warrants using assumptions presented in the table below. The Black-Scholes valuation model was used because management believes it reflects all the assumptions that market participants would likely consider in negotiating the transfer of the warrant. The Company’s derivative liability is classified within Level 3.

The Company estimated the fair value of the warrant derivatives using the following assumptions:

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Private placement of common stock and warrants through placement agent

In July 2023, the Company commenced a private placement of units consisting of common stock and warrants to accredited investors through a placement agent. Each unit sold included a fixed combination of one share of common stock and one warrant to purchase one share of common stock. The purchase price per unit was $0.16, equal to 90% of the intraday VWAP of the common stock as of the last closing on September 27, 2023. From July through September 2023, the Company sold a total of approximately 21.5 million units for a total of approximately $3.0 million of proceeds, net of issuance costs. The Company classified the securities issued in the private placement as a liability until the final close, when it was reclassified as equity. As part of the offering, the Company issued approximately 21.5 million warrants to investors, with each such warrant having a five-year term and an exercise price of $0.50 per share. The warrants were immediately exercisable. In connection with the above, the Company paid the placement agent a total cash fee of approximately $0.4 million, equal to 12% of the gross proceeds of the offering, as well as a one-time fee for

expenses of $5,000, and issued to the placement agent and its designees a total of approximately 3.2 million warrants with an exercise price of $0.16 per share and a ten-year term, representing 15% of the total number of shares of common stock sold in the offering.

Based on contractual payment terms, the private placement transactions above are considered convertible debt instruments prior to final settlement, and the option to enter a final closing that would lower the purchase price is considered a share-settled redemption feature. Therefore, the approximately $0.9 million of cash and non-cash issuance costs associated with such issuances were capitalized and subsequently recognized through the statement of operations as interest expense on the final closing date. As the VWAP of the final closing was lower than the VWAP on the initial closing, the share-settled redemption feature was triggered, and the Company recorded a $2.4 million non-cash loss on note extinguishment.

In addition, approximately $2.3 million of principal and interest of the Placement Agent Notes were converted into approximately 14.3 million units with the same terms as described above except for a warrant exercise price of $0.306. See Note 5, Convertible Instruments and Accrued Interest – Placement Agent Notes, and Liability-classified equity instruments above for additional information.

In December 2023, the Company commenced a private placement of units consisting of common stock and warrants to accredited investors through a placement agent. Each unit sold included a fixed combination of one share of common stock and one warrant to purchase one share of common stock. The purchase price per unit was $0.13 equal to 90% of the intraday VWAP of the common stock as of the last closing on May 3, 2024. From December 2023 through May 2024, the Company sold a total of approximately 52.6 million units for a total of approximately $5.9 million of proceeds, net of issuance costs. The Company classified the securities to be issued in the private placement as a liability until the final close when it was reclassified as equity. As part of the offering, the Company issued approximately 52.6 million warrants to investors, with each such warrant having a five-year term and an exercise price of $0.21 per share (reduced from $0.35 per share as discussed below). The warrants were immediately exercisable when issued on the final closing date. In connection with the above, the Company paid the placement agent a total cash fee of approximately $0.9 million, equal to 13% of the gross proceeds of the offering, as well as a one-time fee for expenses of $5,000, and issued to the placement agent and its designees a total of approximately 7.9 million warrants with an exercise price of $0.13 per share and a ten-year term, representing 15% of the total number of shares of common stock sold in the offering.

Based on contractual payment terms, the private placement transactions above are considered convertible debt instruments prior to final settlement, and the option to enter a final closing that would lower the purchase price is considered a share-settled redemption feature. Therefore, the approximately $1.9 million of cash and non-cash issuance costs associated with such issuances were capitalized and subsequently recognized through the statement of operations as interest expense on the final closing date. As the VWAP of the final closing was lower than the VWAP on the initial closing, the share-settled redemption feature was triggered, and the Company recorded a $7.3 million non-cash loss on note extinguishment. The exercise price for the warrants included in the private placement was lowered from $0.35 per share to $0.21 per share. The exercise price modification resulted in the Company recognizing a $0.1 million non-cash discount on convertible notes.

In addition, approximately $1.0 million principal and interest of the Placement Agent Notes were converted into approximately 10.1 million units with the same terms as discussed above. See Note 5, Convertible Instruments and Accrued Interest – Short-term Notes, and Liability-classified equity instruments above for additional information.

Later in May 2024, the Company sold a total of approximately 1.5 million units for a total of approximately $0.2 million in proceeds, net of offering costs, as part of a follow-on offering with the same terms as the units sold in December 2023 through May 2024. As part of the offering, the Company issued approximately 1.5 million warrants to investors, with each such warrant having a five-year term and an exercise price of $0.21 per share. The warrants were immediately exercisable. In connection with the above, the Company paid the placement agent a total cash fee of approximately $26.0 thousand, equal to 13% of the gross proceeds of the offering.

Warrants

Warrant activity is presented in the table below:

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Warrant exercises

During the fiscal year ended May 31, 2024, the Company issued approximately 3.0 million shares of common stock in connection with the exercise of an equal number of warrants. The stated exercise price was $0.10 per share, which resulted in aggregate gross proceeds of approximately $0.3 million.