Information about Geographic Areas - Long-Lived Assets by Geographic Area (Detail) - USD ($) $ in Thousands	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2014
Long-lived assets by geography
Total long-lived assets	$ 47,469	$ 28,203	$ 2,445
North America [Member]
Long-lived assets by geography
Total long-lived assets	45,163	27,213	1,341
Europe and other [Member]
Long-lived assets by geography
Total long-lived assets	1,827	538	509
Asia Pacific [Member]
Long-lived assets by geography
Total long-lived assets	$ 479	$ 452	$ 595