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Note L - Stock Options - Incentive Stock Options by Excercise Price Range (Details) - Incentive Stock Options [Member] - $ / shares	12 Months Ended
	Sep. 24, 2016	Sep. 26, 2015	Sep. 27, 2014	Sep. 28, 2013
Exercise Price Range 1 [Member]
Options outstanding (in shares)	129,733
Options outstanding, weighted-average remaining contractual life	1 year 219 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 71.68
Options exercisable (in shares)	54,640
Options exercisable, weighted-average exercise price (in dollars per share)	$ 57.98
Exercise Price Range 2 [Member]
Options outstanding (in shares)	226,054
Options outstanding, weighted-average remaining contractual life	3 years 328 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 104.94
Options exercisable (in shares)
Options exercisable, weighted-average exercise price (in dollars per share)
Options outstanding (in shares)	355,787	332,352	295,645	259,852
Options outstanding, weighted-average remaining contractual life	3 years 36 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 92.81	$ 77.04	$ 60.83	$ 51.17
Options exercisable (in shares)	54,640
Options exercisable, weighted-average exercise price (in dollars per share)	$ 57.98

X

- 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

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X

- 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

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- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance 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)(i)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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X

- Definition

Weighted average remaining contractual term for option awards outstanding, 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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X

- 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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