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Accrued Liabilities
6 Months Ended
Nov. 30, 2022
Payables and Accruals [Abstract]  
Accrued Liabilities ACCRUED LIABILITIESAccrued liabilities consisted of the following:
(in thousands)Nov 30, 2022May 31, 2022
Payroll and related expenses$10,185 $20,232 
Royalties1,967 2,986 
Outside services6,739 3,731 
Research and development1,084 1,279 
Sales and franchise taxes815 750 
Rebates421 511 
Other5,322 5,353 
$26,533 $34,842