Note L - Stock Options - Stock Option Activity (Details) - $ / shares	12 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 24, 2016
Incentive Stock Options [Member]
Balance (in shares)	392,981	355,787	332,352
Balance (in dollars per share)	$ 109.41	$ 92.81	$ 77.04
Granted (in shares)	122,595	121,508	120,450
Granted (in dollars per share)	$ 141.07	$ 129.35	$ 108.69
Exercised (in shares)	(64,470)	(78,114)	(86,223)
Exercised (in dollars per share)	$ 90.75	$ 65.49	$ 53.67
Canceled (in shares)	(17,550)	(6,200)	(10,792)
Canceled (in dollars per share)	$ 115.21	$ 100.93	$ 97.07
Balance (in shares)	433,556	392,981	355,787
Balance (in dollars per share)	$ 120.90	$ 109.41	$ 92.81
Options exercisable (in shares)	86,153
Exercisable options (in dollars per share)	$ 97.32
Non-qualified Stock Options [Member]
Balance (in shares)	311,514	311,884	297,941
Balance (in dollars per share)	$ 92.58	$ 75.56	$ 63.34
Granted (in shares)	58,083	59,786	58,720
Granted (in dollars per share)	$ 144.41	$ 129.94	$ 112.35
Exercised (in shares)	(37,328)	(60,156)	(44,777)
Exercised (in dollars per share)	$ 56.85	$ 41.46	$ 42.53
Canceled (in shares)
Canceled (in dollars per share)
Balance (in shares)	332,269	311,514	311,884
Balance (in dollars per share)	$ 105.66	$ 92.58	$ 75.56
Options exercisable (in shares)	155,680
Exercisable options (in dollars per share)	$ 79.35