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Stock-Based Compensation - Narrative (Detail) - USD ($) |  |  |  |  |  | 3 Months Ended
--- | --- | --- | --- | --- | --- | ---
Jul. 15, 2015 | Mar. 03, 2015 | Jun. 24, 2014 | Jun. 25, 2013 | Jul. 11, 2012 | Aug. 02, 2015 | Aug. 03, 2014
Stock Options [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of options granted |  |  |  |  |  | 0 |
Number of options to purchase common stock outstanding |  |  |  |  |  | 110,100 |
Number of options exercisable |  |  |  |  |  | 110,100 |
Weighted average exercise price for options outstanding |  |  |  |  |  | $ 7.75 |
Weighted average exercise price for options exercisable |  |  |  |  |  | $ 7.75 |
Weighted average contractual term for options outstanding |  |  |  |  |  | 2 years 2 months 12 days |
Weighted average contractual term for options exercisable |  |  |  |  |  | 2 years 2 months 12 days |
Aggregate intrinsic value for options outstanding |  |  |  |  |  | $ 2,500,000 |
Aggregate intrinsic value for options exercisable |  |  |  |  |  | 2,500,000 |
Aggregate intrinsic value for options exercised |  |  |  |  |  | $ 814,000 |
Number of options exercised |  |  |  |  |  |  | 0
Number of unvested stock option |  |  |  |  |  | 0 |
Unrecognized stock based compensation cost |  |  |  |  |  | $ 0 |
Share-based compensation expense |  |  |  |  |  | $ 0 | $ 0
Common Stock Awards [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of shares granted |  |  |  |  |  | 0 |
Time Vested Restricted Stock Awards [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of shares granted |  |  |  |  |  | 0 |
Number of shares outstanding and unvested |  |  |  |  |  | 0 |
Remaining unrecognized compensation cost |  |  |  |  |  | $ 0 |
Number of shares vested |  |  |  |  |  |  | 61,667
Weighted average fair value of vested shares |  |  |  |  |  |  | $ 257,000
Weighted average fair value of vested shares, per share |  |  |  |  |  |  | $ 4.17
Time Vested Restricted Stock Awards [Member] | Selling, general and administrative expenses [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Share-based compensation expense |  |  |  |  |  | 0 | $ 4,000
Performance Based Restricted Stock Units [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Remaining unrecognized compensation cost |  |  |  |  |  | $ 2,900,000 |
Number of shares vested |  |  |  |  |  | 115,855 |
Weighted average fair value of vested shares |  |  |  |  |  | $ 1,200,000 |
Weighted average fair value of vested shares, per share |  |  |  |  |  | $ 10.21 |
Closing price of common stock | $ 32.23 |  | $ 17.70 | $ 17.12 | $ 10.21 |  |
Vesting period | 3 years |  | 3 years | 3 years | 3 years |  |
Weighted average period over which unrecognized compensation cost is expected to be recognized |  |  |  |  |  | 2 years 6 months |
Performance Based Restricted Stock Units [Member] | Non-employee [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Closing price of common stock |  |  |  |  |  | $ 30.25 |
Vesting period |  |  |  |  |  | 3 years |
Performance Based Restricted Stock Units [Member] | Maximum [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of shares granted | 107,554 |  | 102,845 | 72,380 | 120,000 |  |
Performance Based Restricted Stock Units [Member] | Maximum [Member] | Non-employee [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of shares granted | 10,364 | 28,000 |  |  |  |  |
Performance Based Restricted Stock Units [Member] | Selling, general and administrative expenses [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Share-based compensation expense |  |  |  |  |  | $ 265,000 | $ 42,000
Performance Based Restricted Stock Units [Member] | First Requisite Service Period [Member] | Non-employee [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting period |  | 16 months |  |  |  |  |
Performance Based Restricted Stock Units [Member] | First Requisite Service Period [Member] | Maximum [Member] | Non-employee [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of shares granted |  | 12,000 |  |  |  |  |
Performance Based Restricted Stock Units [Member] | Second Requisite Service Period [Member] | Non-employee [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting period |  | 28 months |  |  |  |  |
Performance Based Restricted Stock Units [Member] | Second Requisite Service Period [Member] | Maximum [Member] | Non-employee [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of shares granted |  | 16,000 |  |  |  |  |

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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 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 The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + 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)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. + 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 fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + 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)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option 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)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option 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)(1)(iii) -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 Net number of share options (or share units) granted during the period. + 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)(1)(iv)(1) -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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