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Net Loss Per Share - Schedule of Anti-dilutive Securities Excluded from Computation of Earnings Per Share (Detail)
In Thousands, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
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Jul. 31, 2014
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Jul. 31, 2013
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Jul. 31, 2014
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Jul. 31, 2013
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| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
| Anti-dilutive potentially outstanding common shares | 509 | 1,411 | 560 | 1,400 |
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Stock Options [Member]
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| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
| Anti-dilutive potentially outstanding common shares | 297 | 814 | 344 | 861 |
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Restricted Stock Units [Member]
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| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
| Anti-dilutive potentially outstanding common shares | 212 | 597 | 216 | 539 |