Information about Geographic Areas - Long-Lived Assets by Geographic Area (Detail) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2015	Jan. 31, 2014	Jan. 31, 2013
Long-lived assets by geography
Total long-lived assets	$ 28,203	$ 2,445	$ 1,379
North America [Member]
Long-lived assets by geography
Total long-lived assets	27,213	1,341	846
Europe and other [Member]
Long-lived assets by geography
Total long-lived assets	538	509	445
Asia Pacific [Member]
Long-lived assets by geography
Total long-lived assets	$ 452	$ 595	$ 88