Quarterly report pursuant to Section 13 or 15(d)

Employee Benefit Plan - Additional Information (Detail)

v3.19.3.a.u2
Employee Benefit Plan - Additional Information (Detail) - Employee Savings Plan - USD ($)
3 Months Ended 6 Months Ended
Nov. 30, 2019
Nov. 30, 2018
Nov. 30, 2019
Nov. 30, 2018
Defined Contribution Plan Disclosure [Line Items]        
Qualified non-elective contribution     3.00%  
Qualified non-elective contribution expense $ 19,800 $ 15,200 $ 46,000 $ 31,000