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Fair Value Measurements - Summary of Changes in Fair value of Level 3 Financial Liability (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Jan. 31, 2019 | Jan. 31, 2018 | Feb. 01, 2017
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |  |
Change in fair value of contingent earn out liability included in earnings |  | $ (1,438) |
Contingent Earn Out Liability [Member] |  |  |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |  |  |
Balance at January 31, 2017 | $ 15 |  |
Fair value of contingent consideration acquired |  |  | $ 1,314
Change in fair value of contingent earn out liability included in earnings |  | (1,438) |
Currency translation adjustment | (1) | 139 |
Balance at January 31, 2018 | $ 14 | $ 15 |

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- Definition Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479 + Details
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