Note 5 - Investments in and Notes Receivable from Privately Held Companies (Details) - Value of Investments in and Notes Receivable from Privately Held Companies (USD $) In Thousands, unless otherwise specified	Aug. 02, 2014	Feb. 01, 2014
Note 5 - Investments in and Notes Receivable from Privately Held Companies (Details) - Value of Investments in and Notes Receivable from Privately Held Companies [Line Items]
Equity investments	$ 3,271	$ 3,873
Issuer A [Member]
Note 5 - Investments in and Notes Receivable from Privately Held Companies (Details) - Value of Investments in and Notes Receivable from Privately Held Companies [Line Items]
Equity investments	2,000	2,000
Notes receivable:
Note receivable		230
Total equity investments and notes receivable	3,271	4,103
Issuer B [Member]
Note 5 - Investments in and Notes Receivable from Privately Held Companies (Details) - Value of Investments in and Notes Receivable from Privately Held Companies [Line Items]
Equity investments	1,000	1,000
Issuer C [Member]
Note 5 - Investments in and Notes Receivable from Privately Held Companies (Details) - Value of Investments in and Notes Receivable from Privately Held Companies [Line Items]
Equity investments	129	730
Issuer D [Member]
Note 5 - Investments in and Notes Receivable from Privately Held Companies (Details) - Value of Investments in and Notes Receivable from Privately Held Companies [Line Items]
Equity investments	$ 142	$ 143