Leases - Supplemental Statement of Operations Information (Details) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2023	May 31, 2022
Lessee, Lease, Description [Line Items]
Non-cash lease expense	$ 2,694	$ 2,802
Cost of sales
Lessee, Lease, Description [Line Items]
Non-cash lease expense	881	890
Research and development
Lessee, Lease, Description [Line Items]
Non-cash lease expense	193	257
Sales and marketing
Lessee, Lease, Description [Line Items]
Non-cash lease expense	162	160
General and administrative
Lessee, Lease, Description [Line Items]
Non-cash lease expense	$ 1,458	$ 1,495