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Acquisition - Pro Forma Results of Operations (Detail) - Klein Associates Inc. [Member] - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Jan. 31, 2016 | Jan. 31, 2015
Business Acquisitions Pro Forma Information [Line Items] |  |
Revenues | $ 59,702 | $ 91,347
Net loss | $ (38,987) | $ (9,675)
Basic | $ (3.24) | $ (0.78)
Diluted | $ (3.24) | $ (0.78)

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