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. 03, 2013	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	$ 45,845	$ 53,448
Fair Value	46,246	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	29,014	39,595
Fair Value	29,156	39,766
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	16,831	13,853
Fair Value	$ 17,090	$ 14,253