Nature of Operations, Segment Reporting and Geographical Information - Summary of Selected Financial Information by Geographic Area (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 98,448	$ 94,658	$ 88,347
Long-Lived Assets	9,280	9,807
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	69,850	68,316	61,494
Long-Lived Assets	8,940	9,310
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	18,848	16,830	18,181
Long-Lived Assets	168	290
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	5,008	4,487	3,934
Long-Lived Assets	172	207
Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	1,664	1,741	1,408
Long-Lived Assets	0
Central and South America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	3,053	2,436	1,919
Long-Lived Assets	0
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	25	$ 848	$ 1,411
Long-Lived Assets	$ 0