Accrued Liabilities (Tables)

12 Months Ended

May 31, 2018

Payables and Accruals [Abstract]

Accrued liabilities

As of May 31, 2018 and 2017, accrued liabilities consist of the following:

	May 31, 2018		May 31, 2017
(in thousands)
Payroll and related expenses	$	10,235	$	11,383
Royalties	1,537		2,885
Accrued severance	1,940		2,075
Sales and franchise taxes	683		856
Outside services	2,396		1,622
Litigation matters (Note 15)	12,500		12,500
Acculis recall liability	—		2,563
Other	5,135		4,920
Total	$	34,426	$	38,804