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CONSOLIDATED STATEMENTS OF NET INCOME (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 29, 2017	Jan. 31, 2016	Jan. 29, 2017	Jan. 31, 2016
Income Statement [Abstract]
Net sales	$ 76,169	$ 78,466	$ 232,194	$ 235,607
Cost of sales	59,410	61,903	180,115	187,109
Gross profit	16,759	16,563	52,079	48,498
Selling, general and administrative expenses	9,824	9,337	29,171	27,512
Income from operations	6,935	7,226	22,908	20,986
Interest income	(124)	(38)	(164)	(150)
Other expense	69	85	376	405
Income before income taxes	6,990	7,179	22,696	20,731
Income taxes	643	2,317	6,560	7,398
Net income	$ 6,347	$ 4,862	$ 16,136	$ 13,333
Net income per share, basic	$ 0.52	$ 0.39	$ 1.31	$ 1.08
Net income per share, diluted	$ 0.51	$ 0.39	$ 1.29	$ 1.07
Average shares outstanding, basic	12,313	12,331	12,302	12,317
Average shares outstanding, diluted	12,544	12,486	12,517	12,488

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