Quarterly report pursuant to Section 13 or 15(d)

Service Revenue (Narrative) (Details)

v3.22.1
Service Revenue (Narrative) (Details) - USD ($)
$ in Millions
9 Months Ended
Feb. 28, 2022
Feb. 28, 2021
Service Revenue [Line Items]    
Notice of termination period 30 days  
Revenue performance obligations $ 46.1  
Revenue performance obligations timing the Company defers revenue associated with these set-up fees and recognizes it over the period in which such clients are expected to benefit from the material right, which is approximately three to four years  
Impairment loss $ 0.0 $ 0.0
Minimum [Member]    
Service Revenue [Line Items]    
Revenue performance obligations timing, years 3 years  
Maximum [Member]    
Service Revenue [Line Items]    
Revenue performance obligations timing, years 4 years