XML 52 R41.htm IDEA: XBRL DOCUMENT v3.21.1
Revenue and Revenue Recognition - Schedule of Sale of Revenues for Customer Categories (Details)
9 Months Ended
Feb. 28, 2021
Feb. 29, 2020
End User Customers [Member]    
Concentration Risk [Line Items]    
Total 85.00% 88.00%
Distributors [Member]    
Concentration Risk [Line Items]    
Total 15.00% 12.00%