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Summary of Significant Accounting Policies - Consolidated Statements of Operations and Comprehensive Income (Loss) and Balance Sheet (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified |
3 Months Ended | 12 Months Ended | 36 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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Jan. 31, 2014
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Oct. 31, 2013
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Jul. 31, 2013
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Apr. 30, 2013
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Jan. 31, 2013
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Jul. 31, 2012
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Apr. 30, 2012
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Jan. 31, 2014
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Jan. 31, 2013
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Jan. 31, 2012
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Oct. 31, 2012
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| Condensed Consolidating Financial Information [Line Items] | |||||||||||
| Stock-based compensation expense | $ 2,959 | $ 5,929 | $ 2,988 | ||||||||
| Loss from operations | (1,629) | (5,346) | (1,670) | ||||||||
| Net loss | (1,407) | 577 | (215) | (1,985) | 6,536 | (5,998) | (19,577) | (3,030) | (19,165) | (4,014) | (126) |
| Comprehensive loss | (3,336) | (11,217) | (4,970) | ||||||||
| Basic and diluted net loss per share | $ (0.59) | ||||||||||
| Additional paid-in capital | 221,932 | 216,359 | 221,932 | 216,359 | |||||||
| Accumulated loss | (15,688) | (12,658) | (15,688) | (12,658) | |||||||
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As Previously Reported [Member]
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|||||||||||
| Condensed Consolidating Financial Information [Line Items] | |||||||||||
| Stock-based compensation expense | 4,101 | ||||||||||
| Loss from operations | (3,518) | ||||||||||
| Net loss | (17,337) | ||||||||||
| Comprehensive loss | (9,389) | ||||||||||
| Basic and diluted net loss per share | $ (0.53) | ||||||||||
| Additional paid-in capital | 214,531 | 214,531 | |||||||||
| Accumulated loss | (10,830) | (10,830) | |||||||||
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Adjustment [Member]
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|||||||||||
| Condensed Consolidating Financial Information [Line Items] | |||||||||||
| Stock-based compensation expense | 1,828 | ||||||||||
| Loss from operations | (1,828) | ||||||||||
| Net loss | (1,828) | ||||||||||
| Comprehensive loss | (1,828) | ||||||||||
| Basic and diluted net loss per share | $ (0.06) | ||||||||||
| Additional paid-in capital | 1,828 | 1,828 | |||||||||
| Accumulated loss | $ (1,828) | $ (1,828) | |||||||||