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Leases - Supplemental Balance Sheet Information (Details) - USD ($)
$ in Thousands
Nov. 30, 2021
May 31, 2021
Leases [Abstract]    
Operating lease ROU asset $ 8,159 $ 9,382
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] Other assets Other assets
Current operating lease liabilities $ 2,473 $ 2,415
Non-current operating lease liabilities 6,011 7,319
Total lease liabilities $ 8,484 $ 9,734
Weighted average remaining term (in years) 3 years 8 months 4 days  
Weighted average discount rate (percent) 3.80%  
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Other current liabilities Other current liabilities
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Other long-term liabilities Other long-term liabilities