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Accrued Liabilities
12 Months Ended
May 31, 2018
Payables and Accruals [Abstract]  
ACCRUED LIABILITIES
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



In the fourth quarter of fiscal year 2017, the Company issued a voluntary recall of its Acculis probes that were sold over the past two years and recorded a liability of $2.6 million. In the third quarter of fiscal year 2018, the Company completed the replacement of Acculis probes that were returned for Solero probes.