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Quarterly Financial Data (Unaudited) - (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Apr. 30, 2016	Jan. 30, 2016	Oct. 31, 2015	Aug. 01, 2015	May 02, 2015	Jan. 31, 2015	Nov. 01, 2014	Aug. 02, 2014	Apr. 30, 2016	May 02, 2015	Apr. 26, 2014
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 138,463	$ 123,816	$ 157,668	$ 150,221	$ 158,086	$ 118,123	$ 173,115	$ 166,618	$ 570,168	$ 615,942	$ 551,970
Gross profit	27,976	22,029	35,513	35,501	35,237	25,062	40,877	43,403	121,019	144,579	141,710
Net income	$ (2,930)	$ (1,953)	$ 3,168	$ 3,776	$ 3,839	$ 561	$ 7,737	$ 8,745	$ 2,061	$ 20,882	$ 22,206
Basic earnings per share (in dollars per share)	$ (0.07)	$ (0.04)	$ 0.07	$ 0.09	$ 0.09	$ 0.01	$ 0.18	$ 0.20	$ 0.05	$ 0.48	$ 0.52
Diluted earnings per share (in dollars per share)	$ (0.07)	$ (0.04)	$ 0.07	$ 0.09	$ 0.09	$ 0.01	$ 0.18	$ 0.20	$ 0.05	$ 0.47	$ 0.51

X

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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