XML 48 R34.htm IDEA: XBRL DOCUMENT v3.21.2
5. ACCOUNTS RECEIVABLE (Tables)
12 Months Ended
May 31, 2021
Receivables [Abstract]  
Accounts receivable

Accounts receivable comprise (in thousands): 

 

     May 31,  
    2021     2020  
Accounts receivable   $ 5,202     $ 3,717  
Less: Allowance for doubtful accounts     --       --  
    $ 5,202     $ 3,717