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	Feb. 01, 2014	Feb. 02, 2013
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	$ 36,498	$ 53,448
Fair Value	36,817	54,019
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	21,284	39,595
Fair Value	21,312	39,767
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	15,214	13,853
Fair Value	$ 15,505	$ 14,252