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Investments (Tables)
 3 Months Ended
May. 01, 2016
Investments [Abstract]  
Summary Of Investments
The following table summarizes the Company’s available-for-sale investments:
 
May 1, 2016
 
January 31, 2016
(in thousands)
Market Value
 
Adjusted
Cost
 
Gross
Unrealized Gain
 
Market Value
 
Adjusted
Cost
 
Gross
Unrealized
Gain
Cash equivalents
$
16,873

 
$
16,873

 
$
—

 
$
16,866

 
$
16,866

 
$
—

Total investments
$
16,873

 
$
16,873

 
$
—

 
$
16,866

 
$
16,866

 
$
—
Schedule Of Investments, Classified By Maturity Period
The following table summarizes the maturities of the Company’s available-for-sale investments:
 
May 1, 2016
 
January 31, 2016
(in thousands)
Market Value
 
Adjusted Cost
 
Market Value
 
Adjusted Cost
Within 1 year
$
16,873

 
$
16,873

 
$
16,866

 
$
16,866

After 1 year through 5 years
—

 
—

 
—

 
—

Total investments
$
16,873

 
$
16,873

 
$
16,866

 
$
16,866
Summary Of Unrealized Gains (Losses) On Investments
The following table summarizes net unrealized losses arising in the periods presented in addition to the tax associated with these comprehensive income items:
 
Three Months Ended
(in thousands)
May 1, 2016
 
April 26, 2015
Unrealized gain, net of tax
$
(85
)
 
$
(54
)
Increase to deferred tax liability
—

 
—
Schedule of Cost Method Investments [Table Text Block]
The Company has the following investments which are accounted for as cost method investments:
Entity Name
Investment Value
(in thousands)
May 1, 2016
MultiPhy Ltd.
$
12,000

Skorpios Technologies Inc.
3,000

Guangdong Dapu Telecom Technology Co., Ltd.
3,300

Senet, Inc.
1,900

Jariet Technologies Inc.
—

    Total
$
20,200