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v3.7.0.1

Nature of Operations, Segment Reporting and Geographical Information - Additional Information (Detail) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Jan. 31, 2017 USD ($) Customer Segment | Jan. 31, 2016 USD ($) Customer | Jan. 31, 2015 Customer
Segment Reporting Information [Line Items] |  |  |
Number of reporting segments | Segment | 2 |  |
Customer accounted for greater than 10% of net sales | Customer | 0 | 0 | 0
Goodwill assigned | $ 4,521 | $ 4,521 |
T&M [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Goodwill assigned | $ 4,500 | $ 4,500 |

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=64834752&loc=SL49117168-202975 + Details
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- Details
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