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Note 6. 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. 03, 2013
Feb. 02, 2013
Note 6. 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 $ 6,442 $ 6,443
Notes Receivable 500 3,250
Total equity investments and notes receivable 6,942 9,693
Issuer B [Member]
    
Note 6. 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 500 750
Issuer C [Member]
    
Note 6. 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 D [Member]
    
Note 6. 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 E [Member]
    
Note 6. 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 300 300
Issuer F [Member]
    
Note 6. 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
Issuer G [Member]
    
Note 6. 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
Issuer H [Member]
    
Note 6. Investments In and Notes Receivable from Privately Held Companies (Details) - Value of Investments In and Notes Receivable From Privately Held Companies [Line Items]    
Notes Receivable   $ 2,500