XML 57 R45.htm IDEA: XBRL DOCUMENT v3.20.1
Inventories - Schedule of Inventory (Detail) - USD ($)
$ in Thousands
Jan. 31, 2020
Jan. 31, 2019
Inventory Disclosure [Abstract]    
Work-in-progress $ 10,133 $ 9,430
Finished goods 12,838 8,822
Total $ 22,971 $ 18,252