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Stock Option Plans - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Jan. 31, 2016 | Jan. 31, 2015 | Jan. 31, 2014
Stock Based Compensation [Line Items] |  |  |
Compensation expense related to stock-based awards granted | $ 1,293 | $ 1,298 | $ 1,143
Weighted average grant-date fair value of options granted | $ 1.64 | $ 6.23 | $ 14.63
Associated excess tax (benefits) losses | $ (416) |  | $ (5)
Contractual term of stock options granted and outstanding |  |  | 5 years 7 months 13 days
Intrinsic value of options exercised |  | $ 509 |
Fair value of options vested | $ 1,500 | $ 1,200 | $ 601
Options vested | 272,000 |  |
Number of options exercised | 0 |  |
Total unrecognized compensation expense related to unvested stock options | $ 1,000 |  |
Expense expected to be recognized over weighted average period | 1 year 7 months 6 days |  |
Restricted Stock [Member] |  |  |
Stock Based Compensation [Line Items] |  |  |
Expense expected to be recognized over weighted average period | 9 months 18 days |  |
Total unrecognized compensation expense related to unvested restricted stock awards | $ 104,000 |  |
2006 Plan [Member] |  |  |
Stock Based Compensation [Line Items] |  |  |
Vesting period of stock options granted and outstanding | 3 years |  |
Contractual term of stock options granted and outstanding | 10 years |  |
Shares available for grant | 138,000 |  |
1994 Plan [Member] |  |  |
Stock Based Compensation [Line Items] |  |  |
Vesting period of stock options granted and outstanding | 3 years |  |
Contractual term of stock options granted and outstanding | 10 years |  |
1998 Plan [Member] |  |  |
Stock Based Compensation [Line Items] |  |  |
Vesting period of stock options granted and outstanding | 3 years |  |
Contractual term of stock options granted and outstanding | 10 years |  |
2000 Plan [Member] |  |  |
Stock Based Compensation [Line Items] |  |  |
Vesting period of stock options granted and outstanding | 3 years |  |
Contractual term of stock options granted and outstanding | 10 years |  |
Director Plan [Member] |  |  |
Stock Based Compensation [Line Items] |  |  |
Vesting period of stock options granted and outstanding | 1 year |  |
Contractual term of stock options granted and outstanding | 10 years |  |

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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation. + References No definition available. + Details
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- Definition Unrecognized cost of unvested options awarded to employees as compensation. + References No definition available. + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.D.2) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section D -Subsection 2 + Details
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- Definition Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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