Inventories, Net (Tables)
 12 Months Ended
Jul. 31, 2018
Inventory Disclosure [Abstract]  
Summary of inventories
A summary of inventories, net, is as follows:
 
 
July 31, 
 
2018
 
2017
Raw materials and parts
$
49,054

 
$
45,831

Work-in-process
13,189

 
13,484

Finished goods
53,948

 
48,262

Less: reserve for excess and obsolete inventory
(8,599
)
 
(8,853
)
Total inventories, net
$
107,592

 
$
98,724