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	May 03, 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	$ 31,628	$ 36,498
Fair Value	32,007	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	22,036	21,284
Fair Value	22,143	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	9,592	15,214
Fair Value	$ 9,864	$ 15,505