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Nature of Operations, Segment Reporting and Geographical Information - Summary of Selected Financial Information by Geographic Area (Detail) - USD ($) $ in Thousands | 12 Months Ended
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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 |  |

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