Quarterly report pursuant to Section 13 or 15(d)

Accounts Receivable (Details)

v3.21.4
Accounts Receivable (Details) - USD ($)
3 Months Ended 6 Months Ended
Nov. 30, 2021
Nov. 30, 2020
Nov. 30, 2021
Nov. 30, 2020
May 31, 2021
Receivables [Abstract]          
Accounts Receivable, after Allowance for Credit Loss, Current $ 799,866   $ 799,866   $ 684,935
Accounts Receivable, Credit Loss Expense (Reversal) $ 129 $ 0 $ 129 $ 5,992