Note K - Share-based Compensation - A Summary of the Status of the Company's Stock Options (Details) (USD $)	9 Months Ended	12 Months Ended
	Dec. 28, 2014	Mar. 30, 2014
Options outstanding at March 30, 2014 (in shares)	270,250	279,500
Options outstanding at March 30, 2014 (in dollars per share)	$ 23.03	$ 15.22
Options outstanding at March 30, 2014	2 years 10 days	2 years 25 days
Options outstanding at March 30, 2014	$ 14,799	$ 9,381
Granted (in shares)	50,000
Granted (in dollars per share)	$ 53.89
Expired (in shares)	0
Expired (in dollars per share)	$ 0
Exercised (in shares)	(59,250)
Exercised (in dollars per share)	$ 12.22
Options exercisable at December 28, 2014 (in shares)	175,875
Options exercisable at December 28, 2014 (in dollars per share)	$ 15.59
Options exercisable at December 28, 2014	1 year 164 days
Options exercisable at December 28, 2014	$ 10,940