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SHAREHOLDERS' EQUITY (DEFICIT)
3 Months Ended
Aug. 31, 2022
Equity [Abstract]  
SHAREHOLDERS' EQUITY (DEFICIT) SHAREHOLDERS’ EQUITY (DEFICIT)
Common Stock
The Company is authorized to issue 166,666,667 shares of Common Stock at $0.001 par value per share. As of August 31, 2022, 92,872,271 shares of Common Stock were issued and 92,835,974 shares were outstanding and as of May 31, 2022, 97,837,703 shares of Common Stock were issued and outstanding. Note that all shares of Common Stock in this disclosure reflect the one-for-six reverse stock split disclosed in Note 1 - Business and Organization.

Restricted Stock Awards
The Company has granted restricted stock awards to officers and directors. Each of the awards vests upon the completion of service conditions for specified times and a performance condition for the occurrence of an effective registration statement covering the resale of the shares of common stock comprising the stock award with the Securities and Exchange Commission (the “SEC”). The Company will recognize the cost of the restricted stock based on the grant date fair value of the awards over the related vesting terms using a straight-line method when it is probable that the performance condition for the reserved underlying shares will be met.

The following is a summary of the activity and balances for unvested restricted stock awards granted:

Number of SharesWeighted Average Grant Date Fair Value Per Share
Outstanding as of May 31, 20221,366,665 $8.04 
  Granted— $— 
  Vested— $— 
  Forfeited— $— 
Outstanding as of August 31, 20221,366,665 $8.04 
Restricted Stock Units
The Company has granted restricted stock awards to certain consultants, in all cases as compensatory grants for consulting services rendered to the Company which contain performance conditions that affect vesting. The Company will recognize the cost of these RSUs based on the grant date fair value of the awards when it is probable that the performance conditions will be achieved over the related vesting terms.

The following is a summary of the activity and balances for unvested restricted stock units granted:

Number of SharesWeighted Average Grant Date Fair Value Per Share
Outstanding as of May 31, 20221,791,646 $8.04 
  Granted505,834 $4.86 
  Vested— $— 
  Forfeited416,650 $8.04 
Outstanding as of August 31, 20221,880,830 $7.18 

Stock-Based Compensation Expense
Total stock based compensation expense for the respective periods is listed below

in thousandsAs of
August 31, 2022August 31, 2021
Stock-based compensation expense$579$12,337

At August 31, 2022, there was $23.9 million of unrecognized stock compensation expense, which the Company expects to recognize over a weighted-average period of 8.5 months as the performance conditions are met.
Share Forfeiture
On June 6, 2022, through an agreement between the Company and Sparkpool, Sparkpool agreed to forfeit to the Company shares of Common Stock that had been issued pursuant to the service agreement executed on March 19, 2021. Sparkpool ceased providing the contracted services for the Company, and agreed to forfeit shares to compensate for future services that will not be rendered. As a result of this agreement, 4,965,432 shares of Common Stock were forfeited and canceled by the Company.
Equity Plan Approval
On October 9, 2021, the Company’s board of directors approved two equity incentive plans, which the Company’s stockholders approved on January 20, 2022. The two plans consist of the 2022 Incentive Plan, previously referred to in the Company’s SEC filings as the 2021 Incentive Plan (the “Incentive Plan”), which provides for grants of various equity awards to the Company’s employees and consultants, and the 2022 Non-Employee Director Stock Plan previously referred to in the Company’s SEC filings as the 2021 Non-Employee Director Stock Plan (the “Director Plan” and, together with the Incentive Plan, the “Plans”), which provides for grants of restricted stock to non-employee directors and
for deferral of cash and stock compensation if such deferral provisions are activated at a future date. As of August 31, 2022, no awards had been granted under either plan.