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Inventories, net (Details) - USD ($)
$ in Thousands
Oct. 31, 2018
Jan. 31, 2018
Inventory Disclosure [Abstract]    
Raw materials $ 16,020 $ 14,767
Work-in-process 1,750 2,357
Finished goods 28,850 25,795
Inventories, net $ 46,620 $ 42,919