Note K - Stock-based Compensation - Stock Option Activity (Details) - $ / shares	12 Months Ended
	Sep. 30, 2023	Sep. 24, 2022	Sep. 25, 2021
Incentive Stock Options [Member]
Options outstanding (in shares)	433,359	447,622	470,420
Options outstanding, weighted-average exercise price (in dollars per share)	$ 146.98	$ 146.98	$ 136.62
Granted, options (in shares)	0	103,405	111,862
Granted, weighted-average exercise price (in dollars per share)	$ 0	$ 132.38	$ 165.53
Exercised, options (in shares)	(83,401)	(67,782)	(102,976)
Exercised, weighted-average exercise price (in dollars per share)	$ 140.3	$ 131.35	$ 120.83
Canceled, options (in shares)	(78,137)	(49,886)	(31,684)
Canceled, weighted-average exercise price (in dollars per share)	$ 143.96	$ 150.85	$ 143.74
Options outstanding (in shares)	271,821	433,359	447,622
Options outstanding, weighted-average exercise price (in dollars per share)	$ 147.45	$ 146.98	$ 146.98
Exercisable Options (in shares)	102,158
Exercisable Options, weighted-average exercise price (in dollars per share)	$ 145.91
Non-qualified Stock Options [Member]
Options outstanding (in shares)	228,318	293,737	346,442
Options outstanding, weighted-average exercise price (in dollars per share)	$ 132.29	$ 132.29	$ 122.04
Granted, options (in shares)	0	11,545	43,970
Granted, weighted-average exercise price (in dollars per share)	$ 0	$ 132.38	$ 160.14
Exercised, options (in shares)	(11,294)	(60,581)	(55,453)
Exercised, weighted-average exercise price (in dollars per share)	$ 137.81	$ 107.17	$ 120.92
Canceled, options (in shares)	(5,646)	(16,383)	(41,222)
Canceled, weighted-average exercise price (in dollars per share)	$ 153.04	$ 151.5	$ 95.95
Options outstanding (in shares)	211,378	228,318	293,737
Options outstanding, weighted-average exercise price (in dollars per share)	$ 140.79	$ 132.29	$ 132.29
Exercisable Options (in shares)	161,128
Exercisable Options, weighted-average exercise price (in dollars per share)	$ 136.55