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Quarterly Financial Data (Unaudited) - (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Apr. 29, 2017	Jan. 28, 2017	Oct. 29, 2016	Jul. 30, 2016	Apr. 30, 2016	Jan. 30, 2016	Oct. 31, 2015	Aug. 01, 2015	Apr. 29, 2017	Apr. 30, 2016	May 02, 2015
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 143,682	$ 115,719	$ 169,992	$ 157,146	$ 138,463	$ 123,816	$ 157,668	$ 150,221	$ 586,539	$ 570,168	$ 615,942
Gross profit	33,724	23,316	44,308	39,067	27,976	22,029	35,513	35,501	140,415	121,019	144,579
Net income (loss)	$ 909	$ (5,127)	$ 9,021	$ 5,539	$ (2,930)	$ (1,953)	$ 3,168	$ 3,776	$ 10,342	$ 2,061	$ 20,882
Basic earnings (loss) per share (in dollars per share)	$ 0.02	$ (0.12)	$ 0.21	$ 0.13	$ (0.07)	$ (0.04)	$ 0.07	$ 0.09	$ 0.23	$ 0.05	$ 0.48
Diluted earnings (loss) per share (in dollars per share)	$ 0.02	$ (0.12)	$ 0.20	$ 0.13	$ (0.07)	$ (0.04)	$ 0.07	$ 0.09	$ 0.23	$ 0.05	$ 0.47

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- 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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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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