Quarterly report pursuant to Section 13 or 15(d)

Employee Benefit Plan - Additional Information (Detail)

v3.20.1
Employee Benefit Plan - Additional Information (Detail) - Employee Savings Plan - USD ($)
3 Months Ended 9 Months Ended
Feb. 29, 2020
Feb. 28, 2019
Feb. 29, 2020
Feb. 28, 2019
Defined Contribution Plan Disclosure [Line Items]        
Qualified non-elective contribution     3.00%  
Qualified non-elective contribution expense $ 30,000 $ 75,000 $ 20,000 $ 50,000