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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, 2019 | Jan. 31, 2018 | Jan. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenue | $ 136,657 | $ 113,401 | $ 98,448
Long-Lived Assets | 40,054 | 43,385 |
United States [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenue | 83,668 | 69,795 | 69,850
Long-Lived Assets | 36,750 | 39,432 |
Europe [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenue | 31,574 | 29,948 | 18,848
Long-Lived Assets | 3,223 | 3,808 |
Asia [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenue | 8,207 | 3,808 | 1,664
Canada [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenue | 6,692 | 5,373 | 5,008
Long-Lived Assets | 81 | 145 |
Central and South America [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenue | 4,147 | 3,402 | 3,053
Other [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenue | $ 2,369 | $ 1,075 | $ 25

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