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Income Taxes - Additional Information (Detail) - USD ($) | 12 Months Ended
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Jan. 31, 2016 | Jan. 31, 2015 | Dec. 31, 2014 | Jan. 31, 2014
Income Taxes [Line Items] |  |  |  |
Recognized deferred tax liability related to undistributed earnings | $ 0 |  |  |
Unrecognized deferred tax liability related to undistributed earnings | 4,200,000 |  |  |
Deferred tax assets | 2,716,000 | $ 2,837,000 |  |
Valuation allowance, deferred tax assets | (16,647,000) | (1,379,000) |  |
Deferred tax asset | 416,000 | 123,000 |  | $ 5,000
Unrecognized Tax Benefit | 0 | 237,000 |  |
Accrued interest and penalties |  | 145,000 |  |
Potential penalties and interest | 145,000 | $ 10,000 | $ 222,000 |
Foreign Country [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Tax credit carry forwards | $ 823,000 |  |  |
Tax credit carry forwards expiration year | 2021 |  |  |

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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32632-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51675352&loc=d3e28680-109314 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32621-109319 + Details
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