Significant Accounting Policies - Additional Information (Detail) - USD ($) |
3 Months Ended | 9 Months Ended |
|---|---|---|
Oct. 31, 2017 |
Oct. 31, 2017 |
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| Significant Accounting Policies [Line Items] | ||
| Minimum period warranty of product | 1 year | |
| Impairment charge | $ 0 | $ 0 |
| Expected annualized cost saving | $ 18,000,000 | |
| Minimum [Member] | ||
| Significant Accounting Policies [Line Items] | ||
| Support agreements | 12 months | |
| Maximum [Member] | ||
| Significant Accounting Policies [Line Items] | ||
| Support agreements | 36 months |
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- Definition Expected annualized savings from cost reduction program. No definition available.
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- Definition Period for subscription and support agreement. No definition available.
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- Definition Period of warranty. No definition available.
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- Definition Significant Accounting Policies [Line Items] No definition available.
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- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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