XML 47 R43.htm IDEA: XBRL DOCUMENT v3.19.2
Inventories - Schedule of Inventory (Detail) - USD ($)
$ in Thousands
Jul. 31, 2019
Jan. 31, 2019
Inventory Disclosure [Abstract]    
Work-in-progress $ 9,854 $ 9,430
Finished goods 7,522 8,822
Total $ 17,376 $ 18,252