Note L - Stock Options - Incentive Stock Options by Excercise Price Range (Details) - Incentive Stock Options [Member] - $ / shares	12 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 24, 2016	Sep. 26, 2015
Options outstanding (in shares)	433,556	392,981	355,787	332,352
Options oustanding, weighted-average remaining contractual life (Year)	3 years
Options outstanding, weighted-average exercise price (in dollars per share)	$ 120.90	$ 109.41	$ 92.81	$ 77.04
Options exercisable (in shares)	86,153
Options exercisable, weighted-average exercise price (in dollars per share)	$ 97.32
Exercise Price Range 1 [Member]
Range of exercise price, lower limit (in dollars per share)	81.67
Range of exercise price, upper limit (in dollars per share)	$ 113.15
Options outstanding (in shares)	198,303
Options oustanding, weighted-average remaining contractual life (Year)	1 year 292 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 103.75
Options exercisable (in shares)	86,153
Options exercisable, weighted-average exercise price (in dollars per share)	$ 97.32
Exercise Price Range 2 [Member]
Range of exercise price, lower limit (in dollars per share)	128.78
Range of exercise price, upper limit (in dollars per share)	$ 146.03
Options outstanding (in shares)	235,253
Options oustanding, weighted-average remaining contractual life (Year)	3 years 328 days
Options outstanding, weighted-average exercise price (in dollars per share)	$ 135.36
Options exercisable (in shares)
Options exercisable, weighted-average exercise price (in dollars per share)