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Inventories
12 Months Ended
Jan. 31, 2018
Inventory Disclosure [Abstract]  
Inventories
Inventories
Inventories consisted of the following (in thousands):
 
As of January 31,
 
2018
 
2017
Raw materials
$
5,099

 
$
5,781

Finished goods
6,185

 
5,985

Work in progress
1,247

 
1,146

Cost of inventories
12,531

 
12,912

Less allowance for obsolescence
(1,675
)
 
(952
)
Net inventories
$
10,856

 
$
11,960