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Stock-Based Compensation - Additional Information (Detail) - USD ($) |  |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Jan. 01, 2017 | Jun. 04, 2013 | Jan. 28, 2017 | Jun. 30, 2016 | Jan. 28, 2017 | Jan. 30, 2016 | Jan. 31, 2015 | Jul. 31, 2002
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Total stock-based compensation expense |  |  |  |  | $ 3,194,000 | $ 3,773,000 | $ 2,772,000 |
Options to purchase outstanding common stock |  |  | 1,191,568 |  | 1,191,568 | 1,055,568 |  |
Restricted stock units outstanding |  |  | 244,654 |  | 244,654 | 225,885 |  |
Shares reserved for future stock-based grants |  |  | 873,243 |  | 873,243 |  |  |
Maximum contractual terms |  | 10 years |  |  |  |  |  |
Cash dividends paid on common stock |  |  |  |  | $ 0 | $ 25,951,000 | 0 |
Restricted stock units granted |  |  |  |  | 132,500 |  |  |
Restricted stock units, fair value grant prices per share |  |  |  |  | $ 13.49 |  |  |
Restricted Stock Units [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Total stock-based compensation expense |  |  |  |  | $ 1,700,000 | $ 2,000,000 | $ 1,300,000 |
Options exercise prices, Lower limit |  |  |  |  | $ 13.38 |  |  |
Options exercise prices, Upper limit |  |  |  |  | $ 25.52 |  |  |
Options issued to employees, Vested term |  |  |  |  | 4 years |  |  |
Expected period to recognize unvested stock options as stock compensation expense |  |  |  |  | 1 year 4 months 24 days |  |  |
Restricted Stock Units Granted to Directors and Vested on First Anniversary of Grant Date |  |  |  |  | 100.00% |  |  |
Percentage of Restricted Stock Units Granted to Employees vested on Third Anniversary of Grant date |  |  |  |  |  | 100.00% |  |
Restricted stock units granted |  |  |  |  | 132,500 | 107,000 | 97,000 |
Restricted stock units, fair value grant prices per share |  |  |  |  | $ 13.49 | $ 25.52 | $ 18.46 |
Unrecognized compensation expense related to RSUs |  |  | $ 2,000,000 |  | $ 2,000,000 |  |  |
Options issued to employees, vesting percentage |  |  |  |  | 25.00% |  |  |
In Money Stock Option [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Options to purchase outstanding common stock |  |  | 609,194 |  | 609,194 |  |  |
Intrinsic value of in-the-money options outstanding |  |  | $ 2,200,000 |  | $ 2,200,000 |  |  |
Aggregate Intrinsic value options exercisable |  |  | 2,200,000 |  | $ 2,200,000 |  |  |
Weighted average grant, fair values of options granted |  |  |  |  | $ 6.48 | $ 12.06 | $ 9.68 |
Intrinsic value of options exercised |  |  |  |  | $ 300,000 | $ 6,100,000 | $ 200,000 |
Unrecognized stock compensation expense |  |  | $ 2,800,000 |  | $ 2,800,000 |  |  |
Expected period to recognize unvested stock options as stock compensation expense |  |  | 2 years |  |  |  |  |
Employee Stock Purchase Plan [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Maximum shares of common stock award |  |  | 660,000 |  | 660,000 |  |  | 500,000
Payroll deduction of the fair market value |  |  |  |  | 85.00% |  |  |
Shares of common stock issued |  |  |  |  | 31,879 | 19,423 | 19,062 |
Shares remaining under the original authorization |  |  |  |  | 141,290 |  |  |
Number of additional shares authorized | 35,000 |  |  | 125,000 |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Maximum shares of common stock award |  | 3,500,000 |  |  |  |  |  |
Options exercise prices, Upper limit |  |  |  |  | $ 25.52 |  |  |
Options issued to employees, Vested term |  | 4 years |  |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Options exercise prices, Lower limit |  |  |  |  | $ 1.11 |  |  |
Options issued to employees, Vested term |  | 3 years |  |  |  |  |  |
Chief Executive Officer [Member] |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |
Share based compensation accelerated expense |  |  |  |  | $ 600,000 |  |  |

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- Definition Share based compensation arrangement by share based payment award percentage of units granted to directors and vested on first anniversary of grant date. + References No definition available. + Details
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- Definition Share based compensation arrangement by share based payment award percentage of units vested on third anniversary of grant date to employee. + References No definition available. + Details
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- Definition Aggregate number of common shares reserved for future issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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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 Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 + 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 number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + 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)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Number of additional shares authorized for issuance under an established share-based compensation plan. + References No definition available. + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + 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)(3) -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 Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + 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 Number of options outstanding, including both vested and non-vested options. + 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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