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RELATED PARTY TRANSACTIONS - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended 6 Months Ended
Nov. 30, 2022
Nov. 30, 2021
Nov. 30, 2022
Nov. 30, 2021
Note Payable [Line Items]        
Loss on extinguishment of debt $ 0 $ 0 $ 94 $ 1,342
Affiliated Entity        
Note Payable [Line Items]        
Notes payable, related parties   $ 500   $ 500
Debt conversion, converted instrument, shares issued, fair value, per share (in dollars per share)   $ 0.75   $ 0.75
Loss on extinguishment of debt   $ 1,300    
Affiliated Entity | Convertible Common Stock        
Note Payable [Line Items]        
Debt conversion, converted instrument, shares issued (in shares)   5,100,000    
Affiliated Entity | Interest Payable        
Note Payable [Line Items]        
Customer Deposits   $ 1,600   $ 1,600