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CONSOLIDATED STATEMENTS OF NET INCOME (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 29, 2017	Oct. 30, 2016	Oct. 29, 2017	Oct. 30, 2016
Income Statement [Abstract]
Net sales	$ 80,698	$ 75,343	$ 160,230	$ 156,026
Cost of sales	64,894	58,442	127,962	120,705
Gross profit	15,804	16,901	32,268	35,321
Selling, general and administrative expenses	9,415	9,602	18,916	19,348
Income from operations	6,389	7,299	13,352	15,973
Interest expense	37		37
Interest income	(128)	(15)	(259)	(40)
Other expense	321	155	674	307
Income before income taxes	6,159	7,159	12,900	15,706
Income taxes	2,108	2,684	3,748	5,917
Loss from investment in unconsolidated joint venture	75		193
Net income	$ 3,976	$ 4,475	$ 8,959	$ 9,789
Net income per share, basic	$ 0.32	$ 0.36	$ 0.72	$ 0.80
Net income per share, diluted	$ 0.32	$ 0.36	$ 0.71	$ 0.78
Average shares outstanding, basic	12,440	12,308	12,420	12,297
Average shares outstanding, diluted	12,580	12,507	12,613	12,495

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