XML 64 R50.htm IDEA: XBRL DOCUMENT v3.19.1
Inventories - Schedule of Inventory (Detail) - USD ($)
$ in Thousands
Jan. 31, 2019
Jan. 31, 2018
Inventory Disclosure [Abstract]    
Work-in-progress $ 9,430 $ 12,073
Finished goods 8,822 11,310
Total $ 18,252 $ 23,383