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The number of exercisable share options (fully vested and expected to vest) that may be converted 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 (e)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and 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

-Subparagraph (c)(1)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ 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 (g)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ 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)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ 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)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Weighted average remaining contractual term of outstanding stock options, 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 (e)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ 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 (g)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Summary of Significant Accounting Policies and Significant Judgments and Estimates - Stock Options Vested and Expected to Vest (Detail) (USD $)	6 Months Ended
	Mar. 28, 2015	Dec. 27, 2014	Sep. 27, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares	268,612
Weighted-Average Remaining Contractual Life (years)	4 years 11 months 16 days
Weighted Average Exercise Price	$ 8.73
Exercisable Number of Shares	237,588	237,686	236,746
Exercisable Weighted-Average Exercise Price	$ 8.46
$2.01 - $3.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Lower limit	$ 2.01
Range of Exercise Prices, Upper limit	$ 3.00
Number of Shares	15,288
Weighted-Average Remaining Contractual Life (years)	5 months 12 days
Weighted Average Exercise Price	$ 3.00
Exercisable Number of Shares	15,288
Exercisable Weighted-Average Exercise Price	$ 3.00
$3.01 - $4.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Lower limit	$ 3.01
Range of Exercise Prices, Upper limit	$ 4.00
Number of Shares	16,600
Weighted-Average Remaining Contractual Life (years)	1 year 3 months 29 days
Weighted Average Exercise Price	$ 3.66
Exercisable Number of Shares	16,600
Exercisable Weighted-Average Exercise Price	$ 3.66
$4.01 - $5.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Lower limit	$ 4.01
Range of Exercise Prices, Upper limit	$ 5.00
Number of Shares	28,000
Weighted-Average Remaining Contractual Life (years)	6 years 22 days
Weighted Average Exercise Price	$ 4.78
Exercisable Number of Shares	27,100
Exercisable Weighted-Average Exercise Price	$ 4.78
$5.01 - $10.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Lower limit	$ 5.01
Range of Exercise Prices, Upper limit	$ 10.00
Number of Shares	69,900
Weighted-Average Remaining Contractual Life (years)	5 years 3 months 15 days
Weighted Average Exercise Price	$ 7.45
Exercisable Number of Shares	66,040
Exercisable Weighted-Average Exercise Price	$ 7.46
$10.01 - $15.00 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of Exercise Prices, Lower limit	$ 10.01
Range of Exercise Prices, Upper limit	$ 15.00
Number of Shares	138,824
Weighted-Average Remaining Contractual Life (years)	5 years 6 months
Weighted Average Exercise Price	$ 11.41
Exercisable Number of Shares	112,560
Exercisable Weighted-Average Exercise Price	$ 11.39