Employee Benefit Plan (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2021	Feb. 29, 2020
Retirement Benefits [Abstract]
Qualified non-elective contribution, employer contribution, as a percent			3.00%
Qualified non-elective contribution expense	$ 300,000	$ 30,000	$ 500,000	$ 75,000