Severance and Other Restructuring Costs - Change in Severance Liability (Detail) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Apr. 30, 2016 |
Apr. 30, 2015 |
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| Restructuring and Related Activities [Abstract] | ||
| Accrual balance at the beginning of the period | $ 47 | |
| Severance and other restructuring charges incurred | 1,775 | $ 212 |
| Severance costs paid | (766) | |
| Other adjustments | (325) | |
| Accrual balance at the ending of the period | $ 731 | |
| X | ||||||||||
- Definition Restructuring Reserve Other Adjustment No definition available.
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| X | ||||||||||
- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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