XML 37 R27.htm IDEA: XBRL DOCUMENT v3.22.1
Cash and Cash Equivalents (Tables)
9 Months Ended
Feb. 28, 2022
Cash and Cash Equivalents [Abstract]  
Schedule of considers short-term highly liquid investments
   February 28,
2022
   May 31,
2021
 
         
Cash in banks  $5,941,186   $7,317,517 
Money market funds   545,019    53,129 
           
   $6,486,205   $7,370,646