Note 5 - Stock-based Compensation - Stock Option Activity (Details) - $ / shares	6 Months Ended
	Oct. 02, 2016	Sep. 27, 2015
Outstanding at Beginning of Period (in dollars per share)	$ 7.64	$ 6.83
Outstanding at Beginning of Period (in shares)	305,000	330,000
Granted (in dollars per share)	$ 9.60	$ 8.38
Options issued (in shares)	120,000	110,000
Exercised (in dollars per share)	$ 7.68	$ 6.57
Exercised (in shares)	(77,500)	(22,500)
Outstanding at End of Period (in dollars per share)	$ 8.30	$ 7.25
Outstanding at End of Period (in shares)	347,500	417,500
Exercisable at End of Period (in dollars per share)	$ 7.38	$ 6.46
Exercisable at End of Period (in shares)	172,500	225,000