Information about Geographic Areas - Long-Lived Assets by Geographic Area (Detail) - USD ($) $ in Thousands	Jul. 31, 2016	Jan. 31, 2016
Long-lived assets by geography
Total long-lived assets	$ 47,195	$ 47,469
North America [Member]
Long-lived assets by geography
Total long-lived assets	44,555	45,163
Europe and other [Member]
Long-lived assets by geography
Total long-lived assets	1,772	1,827
Asia Pacific [Member]
Long-lived assets by geography
Total long-lived assets	$ 868	$ 479