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Share-Based Compensation - Additional Information (Detail) (USD $) | 3 Months Ended | 6 Months Ended |  | 3 Months Ended | 6 Months Ended | 0 Months Ended | 6 Months Ended |  |  | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended
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Aug. 02, 2014 | May 03, 2014 | Aug. 03, 2013 | May 04, 2013 | Aug. 02, 2014 Equity_Plan | Aug. 03, 2013 | Jan. 31, 2014 | Aug. 02, 2014 Employee Stock Purchase Plan [Member] | Aug. 03, 2013 Employee Stock Purchase Plan [Member] | Aug. 02, 2014 Employee Stock Purchase Plan [Member] | Aug. 02, 2014 Non-Employee Director [Member] | Aug. 01, 2014 Chairman of Board [Member] Scenario, Forecast [Member] | Aug. 01, 2014 Chair of Audit Committee [Member] Scenario, Forecast [Member] | Aug. 01, 2014 Chair of Compensation Committee [Member] Scenario, Forecast [Member] | Aug. 02, 2014 Stock Option [Member] | Aug. 02, 2014 Equity Incentive Plan [Member] | Aug. 03, 2013 Equity Incentive Plan [Member] | Aug. 02, 2014 Equity Incentive Plan [Member] Non-Employee Director [Member] | Aug. 02, 2014 Equity Incentive Plan [Member] Non-Employee Director [Member] | Aug. 02, 2014 2013 Restricted Stock Units (RSUs) [Member] First Anniversary [Member] | Aug. 02, 2014 2013 Restricted Stock Units (RSUs) [Member] Second Anniversary [Member] | Aug. 02, 2014 2014 Restricted Stock Units (RSUs) [Member] | Aug. 02, 2014 2014 Restricted Stock Units (RSUs) [Member] Officer [Member] | Aug. 02, 2014 2014 Restricted Stock Units (RSUs) [Member] Officer [Member] Net Sales Target [Member] | Aug. 02, 2014 2014 Restricted Stock Units (RSUs) [Member] Officer [Member] ORONA Target [Member] | Aug. 02, 2014 2014 Restricted Stock Units (RSUs) [Member] Officer [Member] Third Anniversary [Member] | Aug. 02, 2014 2014 Restricted Stock Units (RSUs) [Member] Non-Employee Director [Member] | Aug. 02, 2014 Restricted Stock [Member] Non-Employee Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of equity incentive plan |  |  |  |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Award vesting period |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4 years |  |  |  |  |  |  |  |  |  |  |  |  | 12 months
Aggregate shares authorized for awards under the Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,000,000 |  |  |  |  |  |  |  |  |  |  |
Shares available for grant under the Plan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 210,164 |  |  |  |  |  |  |  |  |  |  |  |
Restricted stock unit vested percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% | 50.00% |  |  | 50.00% | 25.00% | 25.00% |  |
Maximum disposal restricted percentage of RSU |  |  |  |  | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cumulative budgeted net sales target measurement period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2014 through 2016 |  |  |  |  |
Option expiration period |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |  |  |  |  |  |  |
Stock options grant to each non-employee director |  |  |  |  | 150,600 |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,000 |  |  |  |  |  |  |  |  |
Non-employee director is entitled to an annual cash retainer |  |  |  |  | $ 7,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-employee director is entitled to an annual cash retainer additional |  |  |  |  |  |  |  |  |  |  | 500 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of Chair Retainer payable |  |  |  |  |  |  |  |  |  |  |  | 6,000 | 4,000 | 4,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of stock options grant to each non-employee director |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 798 |  |  |  |  |  |  |  |  | 7,245 |
Non-employee director received restricted stock award value |  |  |  |  | 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options granted weighted average fair value per share | $ 2.84 | $ 2.93 | $ 2.79 | $ 2.79 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized compensation expense related to unvested options |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 568,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized compensation expense related to unvested options, recognize date |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Through May 2018 |  |  |  |  |  |  | Through April 2016 |  |  |  |  |  |
Unrecognized compensation expense related to unvested RSUs and RSAs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 343,000 |  |  |  |  |  |
Employee Stock Purchase Plan discount rate |  |  |  |  |  |  |  |  |  | 15.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reservation of shares under Stock Purchase Plan |  |  |  |  | 247,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares purchase under Employee Stock Purchase Plan |  |  |  |  | 1,592 | 2,266 |  | 777 | 1,054 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock options granted | 693,317 |  |  |  | 693,317 |  | 736,647 | 58,650 |  | 58,650 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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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 Period from grant date that an equity-based award expires, 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)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + 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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