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STOCKHOLDERS' EQUITY (DEFICIT) - Schedule of Restricted Stock Units (Details) - Restricted Stock Units (RSUs) - $ / shares
 6 Months Ended
Nov. 30, 2022
May 31, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]    
Outstanding at beginning of period (in shares) 1,791,666  
Grants in period (in shares) 7,897,907  
Vested (in shares) (179,166)  
Forfeited (in shares) (445,749)  
Outstanding at end of period (in shares) 9,064,658  
Weighted Average Grant Date Fair Value Per Share    
Weighted average grant date fair value, outstanding at beginning of period (in dollars per share) $ 3.07 $ 8.04
Granted (in dollars per share) 2.32  
Vested (in dollars per share) 8.04  
Forfeited (in dollars per share) 7.65  
Weighted average grant date fair value, outstanding at end of period (in dollars per share) $ 3.07