Note 11 - Summary of Quarterly Financial Data (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	May. 02, 2015	Jan. 31, 2015	Nov. 01, 2014	Aug. 02, 2014	May. 03, 2014	[1]	Jan. 25, 2014	[1]	Oct. 26, 2013	[1]	Jul. 27, 2013	[1]	May. 02, 2015	May. 03, 2014	Apr. 27, 2013
Net sales	$ 164,592	$ 143,021	$ 163,575	$ 174,637	$ 164,342		$ 136,774		$ 167,666		$ 172,353		$ 645,825	$ 641,135	$ 662,007
Gross profit	55,476	46,090	57,732	59,842	55,388		44,688		58,830		58,749		219,140	217,655	217,250
Net income	$ 12,182	$ 8,808	$ 12,958	$ 15,363	$ 11,932		$ 7,136		$ 12,497		$ 12,070		$ 49,311	$ 43,635	$ 46,920
Earnings per common share – basic (in dollars per share)	$ 0.26	$ 0.19	$ 0.28	$ 0.33	$ 0.25		$ 0.15		$ 0.27		$ 0.26		$ 1.06	$ 0.93	$ 1.01
Earnings per common share – diluted (in dollars per share)	$ 0.26	$ 0.19	$ 0.28	$ 0.33	$ 0.25		$ 0.15		$ 0.27		$ 0.26		$ 1.05	$ 0.92	$ 1.01

[1] The fourth quarter of Fiscal 2014 consisted of 14 weeks while other quarters consisted of 13 weeks.