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Note 7 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	6 Months Ended		12 Months Ended
	Aug. 04, 2018	Jul. 29, 2017	Aug. 04, 2018	Aug. 31, 2017
Stock Repurchased and Retired During Period, Value	$ 1,429
The August 2017 Share Repurchase Program [Member]
Stock Repurchase Program, Authorized Amount				$ 20,000
Stock Repurchased and Retired During Period, Shares			1.2
Share Price	$ 8.77		$ 8.77
Stock Repurchased and Retired During Period, Value			$ 10,700

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