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Share-Based Compensation Expense
 6 Months Ended
Apr. 30, 2019
Share-based Payment Arrangement [Abstract]  
Share-Based Compensation Expense SHARE-BASED COMPENSATION EXPENSE

The following table summarizes share-based compensation expense for the periods indicated (in thousands):
 
Quarter Ended April 30,
 
Six Months Ended April 30,
 
2019
 
2018
 
2019
 
2018
Product costs
$
702

 
$
824

 
$
1,339

 
$
1,496

Service costs
907

 
722

 
1,677

 
1,346

Share-based compensation expense included in cost of sales
1,609

 
1,546

 
3,016

 
2,842

Research and development
4,083

 
3,796

 
7,474

 
7,052

Sales and marketing
4,346

 
3,760

 
8,131

 
7,088

General and administrative
5,491

 
5,109

 
10,603

 
9,583

Share-based compensation expense included in operating expense
13,920

 
12,665

 
26,208

 
23,723

Share-based compensation expense capitalized in inventory, net
78

 
(45
)
 
138

 
(6
)
Total share-based compensation
$
15,607

 
$
14,166

 
$
29,362

 
$
26,559



As of April 30, 2019, total unrecognized share-based compensation expense was approximately $110.7 million, which relates to unvested stock unit awards and is expected to be recognized over a weighted-average period of 1.6 years.