The number of individuals who were granted stock awards.

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The weighted average fair value at the end of the reporting period 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

No definition available.

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14
-Section F

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Unrecognized cost of unvested share-based compensation awards.

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-Publisher FASB
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-Subparagraph (i)
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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.

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Unrecognized cost of unvested options awarded to employees as compensation.

+ References

No definition available.

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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.

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Description of award terms as to how many shares or portion of an award are no longer contingent on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, to sell the shares, and be entitled to the cash proceeds of such sale. For example, vesting may be expressed as being 25 percent of the shares under option on each anniversary of the grant date.

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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).

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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).

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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.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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.

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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.

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No definition available.

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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).

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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.

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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
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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)
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- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

+ References

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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- Definition

Number of non-vested options outstanding.

+ References

No definition available.

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Stock-Based Compensation - Narrative (Detail)										3 Months Ended	12 Months Ended
Stock-Based Compensation - Narrative (Detail)	Jun. 14, 2016 USD ($) $ / shares shares	Oct. 01, 2015 $ / shares shares	Jul. 15, 2015 $ / shares shares	Mar. 03, 2015 shares	Oct. 01, 2014 $ / shares shares	Jun. 24, 2014 $ / shares shares	Oct. 01, 2013 $ / shares shares	Jun. 25, 2013 $ / shares shares	Jul. 11, 2012 $ / shares shares	Aug. 02, 2015 USD ($) $ / shares shares	May 01, 2016 USD ($) $ / shares shares	May 03, 2015 USD ($) $ / shares shares	Apr. 27, 2014 USD ($) $ / shares shares	May 02, 2010 ExecutiveOfficers $ / shares shares	May 03, 2009 $ / shares shares	Sep. 16, 2015 shares	Apr. 28, 2013 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options granted											0	0	0
2015 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common stock authorized for issuance																1,200,000
Number of shares available for future equity based grants											1,079,809
2007 Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for future equity based grants																0
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate intrinsic value for options outstanding \| $											$ 1,500,000
Aggregate intrinsic value for options exercisable \| $											1,500,000
Aggregate intrinsic value for options exercised \| $											$ 1,300,000	$ 87,000	$ 224,000
Number of unvested stock option											0
Unrecognized stock based compensation cost \| $											$ 0
Stock Options [Member] \| Selling, general and administrative expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense \| $											$ 0	$ 0	$ 10,000
Time Vested Restricted Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted											0	0	0
Weighted average fair value of vested shares, per share \| $ / shares												$ 4.17	$ 4.04
Number of shares vested											0	61,668	61,667
Weighted average fair value of vested shares \| $												$ 257,000	$ 249,000
Number of shares outstanding and unvested											0	0	61,668				123,335
Weighted average fair value of outstanding and unvested shares, per share \| $ / shares													$ 4.17
Remaining unrecognized compensation cost \| $											$ 0
Time Vested Restricted Stock Awards [Member] \| Granted on July 1, 2009 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares outstanding and unvested													26,668
Time Vested Restricted Stock Awards [Member] \| Granted on January 7, 2009 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted															115,000
Vesting description											Vested in equal one-third installments on May 1, 2012, 2013, and 2014
Number of shares outstanding and unvested													35,000
Time Vested Restricted Stock Awards [Member] \| Non-employee [Member] \| Granted on January 7, 2009 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted															10,000
Time Vested Restricted Stock Awards [Member] \| Executive Officer [Member] \| Granted on July 1, 2009 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of executive officers granted time vested restricted common stock \| ExecutiveOfficers														2
Number of shares granted														80,000
Vesting description											Vested in equal one-third installments on July 1, 2012, 2013, and 2014
Closing price of common stock \| $ / shares														$ 5.08
Time Vested Restricted Stock Awards [Member] \| Key management employees [Member] \| Granted on January 7, 2009 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted															105,000
Closing price of common stock \| $ / shares															$ 1.88
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	$ 62,000
Time Vested Restricted Stock Awards [Member] \| Vesting on May 1, 2012 [Member] \| Non-employee [Member] \| Granted on January 7, 2009 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value of vested shares, per share \| $ / shares											$ 11.05
Time Vested Restricted Stock Awards [Member] \| Vesting on May 1, 2013 [Member] \| Non-employee [Member] \| Granted on January 7, 2009 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value of vested shares, per share \| $ / shares											16.25
Time Vested Restricted Stock Awards [Member] \| Vesting on May 1, 2014 [Member] \| Non-employee [Member] \| Granted on January 7, 2009 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value of vested shares, per share \| $ / shares											$ 18.61
Performance Based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing price of common stock \| $ / shares			$ 32.23			$ 17.70		$ 17.12	$ 10.21
Remaining unrecognized compensation cost \| $											$ 3,700,000
Vesting period			3 years			3 years		3 years	3 years
Weighted average period over which unrecognized compensation cost is expected to be recognized											1 year 10 months 24 days
Performance Based Restricted Stock Units [Member] \| Fiscal Year 2013 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value of vested shares, per share \| $ / shares										$ 10.21
Number of shares vested										115,855
Weighted average fair value of vested shares \| $										$ 1,200,000
Performance Based Restricted Stock Units [Member] \| Non-employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Closing price of common stock \| $ / shares											$ 26.24
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] \| Subsequent Event [Member] \| Fiscal Year 2015 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value of vested shares, per share \| $ / shares	$ 28.77
Number of shares vested	12,000
Weighted average fair value of vested shares \| $	$ 345,000
Performance Based Restricted Stock Units [Member] \| Subsequent Event [Member] \| Fiscal Year 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value of vested shares, per share \| $ / shares	$ 17.12
Number of shares vested	37,192
Weighted average fair value of vested shares \| $	$ 637,000
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 \| $											$ 2,600,000	727,000	581,000
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
Common Stock Awards [Member] \| Outside Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted		3,000			3,000		3,000
Closing price of common stock \| $ / shares		$ 31.77			$ 17.95		$ 18.84
Vesting period		0 days			0 days		0 days
Common Stock Awards [Member] \| Selling, general and administrative expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense \| $											$ 95,000	$ 55,000	$ 57,000