Note 2 - Cash, Cash Equivalents and Marketable Securities (Details) - Amortized Cost and Estimated Fair Value of Cash Equivalents and Marketable Securities by Maturity (USD $) In Thousands, unless otherwise specified	Aug. 02, 2014	Feb. 01, 2014
Note 2 - Cash, Cash Equivalents and Marketable Securities (Details) - Amortized Cost and Estimated Fair Value of Cash Equivalents and Marketable Securities by Maturity [Line Items]
Book Value	$ 29,086	$ 36,498
Fair Value	29,333	36,817
Due in 1 Year or Less [Member]
Note 2 - Cash, Cash Equivalents and Marketable Securities (Details) - Amortized Cost and Estimated Fair Value of Cash Equivalents and Marketable Securities by Maturity [Line Items]
Book Value	22,964	21,284
Fair Value	22,987	21,312
Due in Greater Than 1 Year [Member]
Note 2 - Cash, Cash Equivalents and Marketable Securities (Details) - Amortized Cost and Estimated Fair Value of Cash Equivalents and Marketable Securities by Maturity [Line Items]
Book Value	6,122	15,214
Fair Value	$ 6,346	$ 15,505