Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended |
|---|---|---|
Apr. 30, 2016 |
Jan. 31, 2016 |
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| Significant Accounting Policies [Line Items] | ||
| Minimum period warranty of product | 1 year | |
| Provision for loss contract | $ 9.2 | |
| Minimum [Member] | ||
| Significant Accounting Policies [Line Items] | ||
| Support agreements | 12 months | |
| Maximum [Member] | ||
| Significant Accounting Policies [Line Items] | ||
| Support agreements | 36 months |
| X | ||||||||||
- Definition Period for subscription and support agreement. No definition available.
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| X | ||||||||||
- Definition Period of warranty. No definition available.
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| X | ||||||||||
- Definition Loss recognized on projects when there are cost overruns or increases in vendor costs that result in a delay in customer acceptance. No definition available.
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| X | ||||||||||
- Definition Significant Accounting Policies [Line Items] No definition available.
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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