Accrued Liabilities (Tables)

12 Months Ended

May 31, 2020

Payables and Accruals [Abstract]

Accrued liabilities

Accrued liabilities consist of the following:

(in thousands)	May 31, 2020		May 31, 2019
Payroll and related expenses	$	13,059	$	14,987
Royalties	2,392		2,088
Accrued severance	794		504
Sales and franchise taxes	634		807
Outside services	2,222		3,514
Litigation matters (Note 17)	—		2,700
Indemnification holdback	5,000		4,807
Other	5,279		8,931
Total	$	29,380	$	38,338