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Cash and Cash Equivalents
6 Months Ended
Nov. 30, 2017
Cash and Cash Equivalents [Abstract]  
Cash and Cash Equivalents
3. Cash and Cash Equivalents

 

The Company considers short-term highly liquid investments with maturities of three months or less at the time of purchase to be cash equivalents. Cash and cash equivalents were comprised of the following as of November 30, 2017 and May 31, 2017:

 

      November 30,
2017
    May 31,
2017
 
               
  Cash in banks   $ 3,691,221     $ 4,634,245  
  Money market funds     589,682       840,731  
  Certificates of deposit     -       249,000  
      $ 4,280,903     $ 5,723,976