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STOCKHOLDERS' EQUITY - Schedule of Restricted Stock Awards (Details) - Restricted Stock
 9 Months Ended
Feb. 28, 2023
$ / shares
shares
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) | shares 1,366,666
Grants in period (in shares) | shares 77,500
Vested (in shares) | shares (1,048,333)
Forfeited (in shares) | shares 0
Outstanding at end of period (in shares) | shares 395,833
Weighted Average Grant Date Fair Value Per Share  
Weighted average grant date fair value, outstanding at beginning of period (in dollars per share) | $ / shares $ 8.04
Granted (in dollars per share) | $ / shares 2.04
Vested (in dollars per share) | $ / shares 7.60
Forfeited (in dollars per share) | $ / shares 0
Weighted average grant date fair value, outstanding at end of period (in dollars per share) | $ / shares $ 8.04