CONSOLIDATED STATEMENTS OF NET INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Aug. 02, 2015	Aug. 03, 2014
Income Statement [Abstract]
Net sales	$ 80,185	$ 76,060
Cost of sales	63,983	63,345
Gross profit	16,202	12,715
Selling, general and administrative expenses	8,741	7,419
Income from operations	7,461	5,296
Interest expense	24	68
Interest income	(66)	(142)
Other expense (income)	95	(89)
Income before income taxes	7,408	5,459
Income taxes	2,707	2,115
Net income	$ 4,701	$ 3,344
Net income per share, basic	$ 0.38	$ 0.27
Net income per share, diluted	$ 0.38	$ 0.27
Average shares outstanding, basic	12,277	12,212
Average shares outstanding, diluted	12,456	12,404