Fair Value Measurements - Additional Information (Detail) - Contingent Consideration Liability [Member] $ in Millions	3 Months Ended
Apr. 28, 2018 USD ($)
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Estimated target period	7 years
Estimated earnout targets	$ 0.5
Estimated earnout targets	$ (1.4)
Minimum [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Fair value assumptions, risk-adjusted discount rate	2.68%
Probability of success	0.00%
Maximum [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Fair value assumptions, risk-adjusted discount rate	4.90%
Probability of success	0.90%

Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]

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- Definition

Probability of success.

+ References

No definition available.

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- Definition

This element represents the amount of any change recognized during the period in the high-end of the estimated range of outcomes (undiscounted) of a liability assumed in a business combination arising from an item of contingent consideration.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 4
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479

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- Definition

This element represents the amount of any change recognized during the period in the low-end of the estimated range of outcomes (undiscounted) of a liability assumed in a business combination arising from an item of contingent consideration.

+ References

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- Definition

Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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- Definition

Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

+ References

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