Note 6 - Investments in and Notes Receivable from Privately Held Companies (Details) (USD $)	12 Months Ended			3 Months Ended	12 Months Ended	1 Months Ended	3 Months Ended										1 Months Ended
	Jan. 28, 2012	Feb. 01, 2014	Feb. 02, 2013	Jan. 30, 2010 Issuer A [Member] Preferred Stock Investments [Member]	Jan. 31, 2009 Issuer A [Member] Preferred Stock Investments [Member]	Nov. 30, 2010 Issuer A [Member]	Oct. 30, 2010 Issuer B [Member] Preferred Stock Investments [Member]	Feb. 01, 2014 Issuer C [Member] Preferred Stock Investments [Member]	Jan. 29, 2011 Issuer C [Member] Preferred Stock Investments [Member]	Nov. 02, 2013 Issuer D [Member] Convertible Note Receivalbe [Member]	Jan. 29, 2011 Issuer D [Member] Convertible Note Receivalbe [Member]	Nov. 02, 2013 Issuer E [Member] Recognized [Member] Preferred Stock Investments [Member]	Nov. 02, 2013 Issuer E [Member] Held in Escrow [Member] Preferred Stock Investments [Member]	Nov. 02, 2013 Issuer E [Member] Preferred Stock Investments [Member]	Jul. 30, 2011 Issuer E [Member] Preferred Stock Investments [Member]	Oct. 29, 2011 Issuer F [Member]	Jan. 25, 2012 Issuer G [Member]
Note 6 - Investments in and Notes Receivable from Privately Held Companies (Details) [Line Items]
Payments to Acquire Investments	$ 2,142,000			$ 1,000,000	$ 1,000,000		$ 1,000,000		$ 1,000,000		$ 300,000				$ 2,000,000	$ 100,000
Other than Temporary Impairment Losses, Investments								300,000		300,000
Proceeds from Sale of Long-term Investments												2,100,000	500,000	2,600,000
Gain (Loss) on Sale of Equity Investments														100,000
Notes, Loans and Financing Receivable, Gross, Noncurrent						1,000,000											2,500,000
Investment Interest Rate						5.00%											3.00%
Debt Instrument, Decrease, Forgiveness																	2,500,000
Notes Receivable, Related Parties		$ 200,000	$ 3,300,000