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Accrued Liabilities
6 Months Ended
Nov. 30, 2021
Payables and Accruals [Abstract]  
Accrued Liabilities ACCRUED LIABILITIESAccrued liabilities consisted of the following:
(in thousands)Nov 30, 2021May 31, 2021
Payroll and related expenses$13,308 $20,408 
Royalties2,260 2,663 
Accrued severance29 548 
Sales and franchise taxes1,081 631 
Outside services4,929 4,256 
Litigation Matters— 975 
Rebates771 544 
Other5,337 5,434 
$27,715 $35,459